東海光学 List of Products and Services

This product features low dispersion and is designed to minimize changes in pulse shape due to reflection, making it a mirror suitable for use in femtosecond laser optical systems. It can also be used in applications such as laser processing machines and multiphoton excitation microscopes. We can design and propose solutions based on your desired wavelength. Please feel free to contact us when you need assistance. 【Features】 ■ Low dispersion *For more details, please refer to the related links or feel free to contact us.

• mirror

This product is a mirror designed for dispersion compensation that restores pulses to their original sharp shape. By adjusting the thickness of each layer, it is designed to have a dispersion opposite to that of materials like glass, allowing the pulse after reflection to return to a state close to that immediately after oscillation. It is designed to match the wavelength range of the pulse and the amount of dispersion compensation for each optical system. 【Features】 ■ Designed to have a dispersion opposite to that of materials like glass ■ The pulse after reflection returns to a state close to that immediately after oscillation *For more details, please refer to the related links or feel free to contact us.

• mirror

This product is a mirror and AR coating with high laser resistance, suitable for use in high-power laser optical systems, achieved by considering factors such as the polishing state of the substrate, deposition materials, and deposition conditions. It is used in applications requiring high durability, such as laser optical systems and laser processing machines. In the design of the mirror's coating, the standing wave electric field strength formed within the multilayer film is taken into account to enhance resistance to lasers. 【Features】 - Precise design conducted by engineers well-versed in advanced thin film theory and optical materials. - High-performance optical coating products proposed according to the desired wavelength. - Laser protection glass for consumables can also be manufactured according to the desired wavelength and substrate dimensions. *For more details, please refer to the related links or feel free to contact us.

• mirror

We would like to introduce the high-reflective mirrors (dielectric multilayer mirrors, metal mirrors) that we handle. Dielectric multilayer mirrors can be manufactured to have high reflectivity with low light loss. They can be coated with films that are highly durable in various environmental conditions. Metal mirrors can be produced with low angle-of-incidence dependence. By combining them with dielectric films, we can achieve enhanced reflection effects. 【Application Examples】 ■ Analysis and Sensing ■ Semiconductors *For more details, please refer to the related links or feel free to contact us.

• mirror

We would like to introduce the "Prism" that we handle. "Polarizing beam splitter" used for separating the polarization of incident light. "Cubic non-polarizing beam splitter" used in cameras and microscopes. "Right-angle prism" that can provide high-precision transmission wavefronts. Please feel free to contact us when you need assistance. 【Features】 ■ Polarizing Beam Splitter - Used for separating the polarization of incident light. - Transmits P-polarized light and reflects S-polarized light at a 90-degree angle. - AR coating on the exit surface and a coating for polarization separation on the sloped surface. - Can provide both transmission and reflection wavefronts with high precision. *For more details, please refer to the related links or feel free to contact us.

• prism

This product is an optical filter used for fluorescence observation. It transmits only the fluorescence emitted by the target fluorescent substance while blocking excitation light and other unwanted light, creating an environment conducive to fluorescence observation. Since the excitation wavelength and fluorescence wavelength differ depending on the fluorescent reagent used, filters suited for fluorescence observation are employed. 【Features】 ■ High blocking performance for excitation light and other unwanted wavelength bands ■ Measurement guarantee of OD6 ■ Achieves high-contrast fluorescence observation ■ Custom design available upon request *For more details, please refer to the related links or feel free to contact us.

• filter

This product is an optical filter that utilizes light interference from thin films to reflect specific wavelengths of light while allowing other wavelengths to pass through. By allowing the desired wavelength of light to pass through and reflecting the unwanted wavelengths, it is possible to separate wavelengths. We offer a "UV Cut Filter" that cuts ultraviolet (UV) light while allowing visible light to pass through, an "IR Cut Filter" that cuts infrared (IR) light while allowing visible light to pass through, and a "Non-Polarizing Edge Filter" that suppresses the separation of transmittance. 【Product Lineup】 ■ UV Cut Filter ■ IR Cut Filter ■ Non-Polarizing Edge Filter *For more details, please refer to the related links or feel free to contact us.

• filter

This product is a color matching filter that reproduces the sensitivity curve of the human eye, allowing cameras and sensor devices to achieve the same visual perception as humans by inserting it between them. By layering dielectric films on glass and utilizing interference effects at the multilayer film interfaces, it achieves the desired transmission spectrum. Customization of spectral transmittance and the deposition of anti-reflective coatings and UV-IR cut filters on the backside are also possible. 【Features】 ■ Achieves f1' below 2% ■ Passes various reliability tests with a dense film ■ Customizable upon request *For more details, please refer to the related links or feel free to contact us.

• filter

This product is an optical filter that closely approaches the standard relative spectral sensitivity defined by the International Commission on Illumination (CIE) in its spectral transmittance curve. By stacking dielectric films on glass and utilizing interference effects at the multilayer film interfaces, the desired transmission spectrum is achieved. It is used for measuring brightness and luminance. 【Features】 ■ Achieves less than f1'2% ■ Passes various reliability tests with a dense film ■ Customizable upon request *For more details, please refer to the related links or feel free to contact us.

• filter

This product is a plate-type beam splitter used to separate incoming light into two components by reflecting part of the light and transmitting the rest. It can be used not only for "neutral separation," represented by half mirrors, and "two-color separation," which reflects a specific wavelength range while transmitting the rest, but also for manufacturing polarization beam splitters that separate p-polarized and s-polarized light from the incident light. There are prism types and plate types available. 【Features】 ■ Suitable for use in the ultraviolet range, or when laser resistance and heat resistance are required. ■ Design and manufacturing of non-polarizing beam splitters are also possible. *For more details, please refer to the related links or feel free to contact us.

• prism

This product is a filter that transmits only specific wavelengths and cuts off other light. It is widely used in analyzers, measuring instruments, optical communication devices, sensors, and ultraviolet irradiators. It provides sharp wavelength separation and high transmission rates. Fluorescent filters used for fluorescence observation require high optical density, and we can ensure this from design to manufacturing and spectral measurement. 【Use Cases】 ■ Medical and Healthcare ■ Analysis and Sensing ■ Semiconductors ■ Communication *For more details, please refer to the related links or feel free to contact us.

• filter

In the case of fine substrates that are turned into chips for products, even losing a part of the outer circumference due to the holder results in a loss. For expensive materials like crystal substrates, even a few sheets of loss cannot be overlooked. In response to clients' demands for cost-cutting, it was necessary to review the coating process. Our company has been solving customer challenges through film formation design and the provision of optical components, but for this issue, we focused on re-evaluating the substrate holding method. By improving the deposition axis and creating a method to secure from the top and sides, we made it possible to coat the entire surface of the substrate. As a result, there are no longer any areas without film adhesion, allowing us to turn all materials into products without waste, leading to significant cost reductions. 【Case Overview】 ■Challenge: Eliminate material loss caused by non-adhesion due to vacuum deposition ■Solution: Improved production methods to enable coating of the entire substrate ■Future Outlook: Strive to solve challenges with a broader perspective beyond film formation design *For more details, please refer to the PDF document or feel free to contact us.

• Other optical parts

The "dichroic filter" has the ability to separate colors of light and is used for purposes such as expressing specific colors or cutting ultraviolet and infrared light. However, increasing the light intensity can cause the coating to absorb heat, which not only prevents it from demonstrating its film-forming performance but also poses a risk of damaging or degrading the substrate. Our company has a proven track record of combining various coating technologies to create coatings with complex performance characteristics. In this case, we provided a coating that maintains the required performance, such as UV cutting, while suppressing heat absorption and excelling in "heat resistance" and "laser resistance." [Case Overview] ■ Challenge: To enhance the durability of high-brightness projectors and achieve clarity in images. ■ Solution: Imparting "durability" and "laser resistance" through complex thin-film design and processing technology. ■ Featured Product: Dichroic Filter *For more details, please refer to the PDF document or feel free to contact us.

• filter

The structure of the concentrator needs to be designed to efficiently gather Cherenkov light, and it was also required to be lightweight so that the telescope could quickly change its orientation according to cosmic phenomena. In the concentrator developed by our company for optical sensors, we utilized plastic forming technology and coating technology. The substrate of the concentrator employs plastic, achieving a smooth surface at the nano level and reducing weight. In the field of astronomy, our plastic forming technology is also being adopted to support the elucidation of the mysteries of the unknown universe. [Case Overview] ■ Challenge: Increase the reflectivity and durability of the Cherenkov light concentrator mirror ■ Solution: Achieved high optical performance, lightweight, and high durability with our unique plastic forming technology ■ Future Outlook: Apply the advanced technology used in space observation to the development of sensing technology ■ Featured Product: Resin Coating *For more details, please refer to the PDF document or feel free to contact us.

• Sensors

The full inspection, which involves 1,000 scans per day, has been a bottleneck due to the significant costs, effort, and time required. Our "Spectral Transmittance Meter TL Series" is a product developed to shorten the time for in-process and pre-shipment inspections, capable of measuring each sheet in about 2 seconds, thus significantly reducing inspection time. Recently, in response to inquiries from a film manufacturing company, we proposed this product, and due to its low cost, it was quickly implemented on-site. This full inspection before shipment can also be expanded to other factories, leading to increased efficiency in the process. [Case Overview] ■ Challenge: Reduce time and costs associated with transitioning from sampling inspections to full inspections. ■ Solution: Enable anyone to easily conduct full inspections. ■ Future Outlook: Widely used for inspecting and judging colored transparent materials such as painted and printed products. ■ Featured Product: TL Series *For more details, please refer to the PDF document or feel free to contact us.

• Optical Measuring Instruments

Metal mirrors have the advantage of being less prone to discrepancies in the speed of light (low dispersion), but it is difficult to increase their reflectivity and laser resistance, which limits their ability to enhance detection capabilities in biological observation due to the inability to increase light intensity. Our company has developed a low-dispersion dielectric multilayer mirror designed to minimize changes in pulse shape associated with reflection, leveraging the technology cultivated through research and development of mirrors for femtosecond lasers. The detection capabilities of biological observation using multiphoton excitation microscopy have significantly improved. [Case Overview] ■ Challenge: To enhance reflectivity and laser resistance while suppressing group delay dispersion of femtosecond lasers. ■ Solution: A low-dispersion dielectric multilayer mirror that showcases the characteristics of femtosecond lasers. ■ Featured Product: Mirror for femtosecond lasers (low-dispersion mirror) *For more details, please refer to the PDF document or feel free to contact us.

• mirror

We received a request from a semiconductor manufacturer to analyze samples of prisms used in integrated circuit manufacturing equipment sensors. Upon conducting an analysis with our own application of grease (contamination), we discovered that the contamination disrupted the total reflection conditions, resulting in a loss of light intensity. In the event that contamination occurs, it could lead to a decrease in detection accuracy and potentially cause process defects, making prompt improvements essential. Therefore, we proposed a prism equipped with a high-reflective mirror that maintains high reflectivity even if contamination occurs, referred to as the "Prism with Induced Multi-Layer Film Mirror." We received high praise from the semiconductor manufacturer, and it was adopted immediately. [Case Overview] ■ Issue: Contamination on the reflective surface affects and reduces reflectivity ■ Solution: Maintains high reflectivity even with contamination, contributing to the quality assurance of precise semiconductor manufacturing ■ Featured Product: Prism *For more details, please refer to the PDF document or feel free to contact us.

• prism

Cameras have been installed on the railway platform for crew members to ensure the safety of passengers. Additionally, by installing cameras in the vehicles, drivers can monitor the boarding and alighting status of passengers on a monitor in the driver's seat. Typically, surveillance cameras are housed in enclosures. Fogging of the enclosure's window is a significant issue for maintaining clear image quality. However, outdoor cameras installed on platforms often fog up due to humidity, snowfall, and freezing conditions, leading to a demand for maintenance-free protective glass. In response, our company proposed "Heater Glass," which prevents fogging outdoors, contributing to safety on station platforms. [Case Overview] ■ Challenge: Surveillance cameras exposed outdoors are prone to fogging due to weather and temperature, making it difficult to ensure passenger safety. ■ Solution: The ITO transparent conductive film prevents fogging through the heating of the heater glass. ■ Featured Product: Heater Glass *For more details, please refer to the PDF document or feel free to contact us.

• Glass

The challenge in designing a luxurious toilet was the flush sensor. The IR sensor window made of infrared-transmitting dark plastic could only be selected in "black," which created a sense of discomfort in a space predominantly featuring white. In response, we proposed "white" and "silver" colors using our unique dielectric film technology. This has enabled the realization of a luxurious toilet space. [Case Overview] ■ Challenge: Only "black" could be selected, causing discomfort in a predominantly white space. ■ Solution: We proposed white and silver colors using our unique dielectric film technology. ■ Future Outlook: Broadly addressing non-contact solutions in public spaces such as hotels, stations, and parking areas. ■ Featured Products: Color IR Window / White IR Window *For more details, please refer to the PDF document or feel free to contact us.

• Sensors

The "TL-100" is a spectrophotometer that allows for easy measurement of the transmittance of transparent colored substrates and lenses with just the push of a button. Compared to conventional products, it features a compact and simple structure that emphasizes usability in field measurements while considering operability. Additionally, by adopting LED as the light source, it achieves energy efficiency and long lifespan. The design makes it easy to understand where to place the object during measurement. 【Features】 ■ Easy measurement of spectral transmittance ■ Measurement data can be saved in CSV format ■ Achieves energy efficiency and long lifespan ■ User-friendly design For more details, please refer to the catalog or feel free to contact us.

• Optical Measuring Instruments

Water-repellent coatings can be applied to the surface of anti-reflective films and mirror coatings to provide water-repellent properties. Anti-fouling coatings not only have water-repellent properties but also oil-repellent properties, making it easier to repel not only water but also oils. Water-repellent and oil-repellent properties can be applied to the surface of anti-reflective films and mirror coatings. 【Features】 ○ Film formation considering the spectral characteristics after anti-fouling and water-repellent coating is possible ○ Resistant to scratches ○ Film formation is possible not only on glass substrates but also on resin substrates ○ Contact angle: 110° For more details, please contact us or download the catalog.

• Processing Contract

The scratch-resistant anti-reflective coating is an anti-reflective coating that improves scratch resistance and environmental resistance by forming a significantly denser optical multilayer film compared to conventional anti-reflective coatings. The combination of the anti-fouling coating and scratch-resistant AR coating results in a smooth surface that is less prone to dirt and easy to maintain. It can be used in applications where conventional anti-reflective coatings could not be applied due to harsh usage environments. 【Features】 ○ Compatible with anti-fouling and water-repellent functions ○ Tough AR coat that is resistant to scratches ○ Load scratch test results are more than twice that of conventional coatings (compared to our own) For more details, please contact us or download the catalog.

• Processing Contract

The anti-static coating prevents dust from adhering and suppresses static electricity generated during cloth wiping, thereby preventing the reattachment of dust. It is possible to customize the design to improve maintainability by combining it with anti-fouling coatings, anti-reflective films, filters, etc. Additionally, low-temperature processing of resin materials is also possible. We can design and propose solutions according to your desired wavelength. 【Features】 ○ By preventing the substrate from becoming charged, it makes it difficult for dust and other particles to adhere. ○ It achieves anti-static effects without compromising the spectral characteristics of anti-reflective films or multilayer film filters. ○ Film formation on resin substrates is also possible. For more details, please contact us or download the catalog.

• Processing Contract

High-power laser coatings are high-strength coatings that can be processed on large equipment, providing cost advantages during mass production. Coatings on fiber end faces can also be achieved through low-temperature film formation. We can design and propose solutions according to your desired wavelength. 【Product Lineup】 ○ 355nm Coating ○ 532nm Coating ○ 1064nm Coating For more details, please contact us or download the catalog.

• Processing Contract

Functional Decorative Coating White Infrared Window White IR Film/Window now allows for a variety of colors to be chosen for infrared sensor covers (IR Windows), which previously only had the option of "black," thanks to Tokai Optical's unique dielectric film deposition technology. Additionally, the completion of the highly requested white color brings new possibilities for product design in items such as smartphones. 【Features】 [White IR Film] ○ High flexibility allows for easy cutting processing ○ High transmittance enables use as an infrared communication window ○ Low diffusion makes it suitable for proximity sensor applications [White IR Window] ○ White color options are also available for molded products For more details, please contact us or download the catalog.

• filter

ITO transparent conductive film heater windows can generate heat by forming an ITO transparent conductive film on glass and applying electricity. This prevents fogging of windows, such as those on surveillance camera housings. Anti-reflective and water-repellent coatings can be applied to the outer glass surface. Compared to conventional tin oxide films, it is possible to lower the resistance value, allowing for low-voltage operation without compromising transparency, even for small windows. We can customize the finishing with electrodes, lead wires, and insulation treatment according to your requirements. 【Specifications】 ○ Standard substrate size: φ50–70mm, □50–70mm ○ Compatible voltage: 12V, 24V, 100V ○ Power consumption: 2–3W/h ○ Temperature rise: approximately ±30℃ (at room temperature, no wind) For more details, please contact us or download the catalog.

• Other heaters

Femtosecond laser optical thin film filters and chirped mirrors are designed to have a dispersion opposite to that of materials like glass by adjusting the thickness of each layer, allowing the pulse after reflection to return to a state close to that immediately after oscillation. They are designed to match the wavelength range of the pulse and the amount of dispersion compensation for each optical system. 【Features】 ○ Mirrors for dispersion compensation used in optical systems such as femtosecond lasers ○ Design and proposals tailored to the desired wavelength ○ Designed to allow longer wavelengths of light to penetrate deeper into the mirror, aligning the phase after reflection and reducing pulse width For more details, please contact us or download the catalog.

• mirror

Functional decorative coating: With the color IR window, the infrared window (Ir Window) for IrDA communication and infrared remote controls, which previously only offered "black," can now be selected in various colors thanks to Tokai Optical's unique dielectric film deposition technology. This opens up new possibilities that add value to products. The infrared transmittance remains unchanged. The visible light absorption characteristics and infrared transmittance are synthesized with the reflection characteristics of the dielectric multilayer film. It is possible to have any desired reflection color (interference color) without compromising transmittance. 【Features】 ○ As an insulator, it can also be used as decoration for touch displays. ○ Not only does it offer unique color expression through deposition, but it also has high infrared transmittance, making it suitable for sensor window decoration. ○ It can enhance the design of various infrared sensor windows. ○ Processing into molded products is also possible. For more details, please contact us or download the catalog.

• filter