Tsubosaka Electric Co., Ltd. List of Products and Services

It can instantly and quantitatively measure the amount of focus shift due to aperture, not only for fixed lenses and zoom lenses. It can measure the focal length error. By projecting a chart onto the lens and scanning a mirror placed on the image plane up and down, it precisely counts the focus position. With 16 levels of sensitivity adjustment, it has a wide measurement range and supports various types of lenses. It is capable of RS232C communication, making data control via PC easy. Because it provides precise measurement results in a short time, it is extremely valuable not only for development but also for inspection processes on manufacturing lines.

The "LFM-1 Series" is a device that measures lens flare rate (veiling glare index) according to the measurement method specified in ISO 9358:1994. By changing the light source to an IR-LED, it is compatible with lenses that use near-infrared, such as security cameras, smartphones, and in-vehicle cameras. It is capable of measuring veiling glare and image plane illuminance ratio for near-infrared compatible lenses. 【Features】 ■ Measures lens flare rate (veiling glare index) ■ Light source can be changed to near-infrared ■ Can measure near-infrared compatible lenses *For more details, please refer to the PDF document or feel free to contact us.

This device measures the aperture diameter area of cameras and interchangeable lenses. - Aperture diameter at the time of synchronization contact - Maximum aperture diameter at the time of shutter release - Open aperture diameter - Aperture diameter at the timing of the start of aperture operation synchronization It displays the aperture error amount (●EV) compared to the reference diameter as measurement results. The SENS sensitivity, which can be calibrated and registered with a standard lens or reference camera, has four series and supports measurements for zoom lenses and others. The measurement unit can be installed vertically as well as horizontally (the angle position of the display unit can be adjusted). It allows posture difference measurements with two types of optical axes depending on the installation method. Equipped with a communication interface (RS-232C). It enables external output of measurement data and external control of the tester.

The "GCS-2T" automatically captures and evaluates images of ghosting and flare from small lenses onto a PC. It allows for the illumination of the lens from various angles to check for ghosting and can reproduce those illumination angles. Based on the RGB data of the images, it calculates area, centroid coordinates, gray level, roundness, hue, saturation, and brightness (optional). 【Features】 ■ Reproduces and evaluates ghosting and flare occurrence ■ Illuminates the lens from various directions ■ Electric movement of the light source from directly above to horizontal ■ Electric rotation of the lens to switch illumination angles ■ Automatically saves imager images (JPEG/bitmap) continuously to PC files *For more details, please refer to the PDF document or feel free to contact us.

The "LSA-2" is a spherical aberration measuring device that can automatically measure the spherical aberration of lenses. In addition to measuring relative focal positions, it can be customized to fit the user's measuring lens specifications. Furthermore, it can be easily set up on a PC, allowing for control and data processing. 【Features】 ■ Automatically measures the spherical aberration of lenses ■ Capable of measuring relative focal positions ■ Customizable to fit the user's measuring lens specifications ■ Image processing with a high-resolution CMOS camera ■ Easy setup, control, and data processing on a PC *For more details, please refer to the PDF materials or feel free to contact us.

The "FL-800" is a flange back (FB) measurement device that can automatically measure the flange back and focal length of lenses. It measures the principal point position based on the nodal slide method and performs image processing using a high-resolution CMOS camera. 【Features】 ■ Automatically measures the flange back (FB) and focal length of lenses ■ Measures the principal point position based on the nodal slide method ■ Image processing using a high-resolution CMOS camera *For more details, please refer to the external link page or feel free to contact us.

The "BPC-1000" is the best focus tester that is convenient for measuring two-focus cameras and high-magnification zoom lenses. It captures images while moving a CMOS imager positioned near the focal plane of the lens under test using an electric stage. The focus position is detected through edge analysis MTF measurement. 【Features】 ■ Measures the focal position of the lens using an image (chart) at infinity achieved with a built-in collimator lens. ■ Measures and displays the focal position for each spatial frequency. ■ Allows for individual sensitivity measurements based on the type of lens and differences in focal length, making it convenient for measuring two-focus cameras and high-magnification zoom lenses. *For more details, please refer to the PDF document or feel free to contact us.

The "AFC Series" is used when you want to shorten the actual shooting distance compared to the assumed distance using a lens. It is a device used in situations like "I want to shoot with the focus set at 20m, but I can't secure 20m." 【Features (AFC-500)】 ■ For adjustment and inspection of digital cameras and video cameras ■ Evaluation of resolution for zoom lenses ■ Specifications can be modified to match the user's desired lens from finite to infinite distance ■ Changeable light source (halogen, LED) *For more details, please refer to the PDF document or feel free to contact us.

The "AFC-500" is a collimator for adjusting and inspecting various cameras. It has compact dimensions of 200(W) x 260(H) x 750(D) mm, making it suitable for tabletop use. The light source uses a halogen lamp with dimming functionality. Please use it for evaluating resolution at infinite focus. 【Extended Features】 ■ LED light source, cold cathode fluorescent lamp (CCFL) ■ Focus position: infinite/finite ■ Custom resolution chart *For more details, please refer to the PDF document or feel free to contact us.

Measuring the illuminance of the image plane for various lenses Data acquisition via PC Custom-made lenses for your applications, ranging from DSLR camera lenses to lenses for mobile phones and smartphones.

This is a system that can measure the MTF, which shows the spatial resolution characteristics of a camera, in real-time and simultaneously from multiple directions. It analyzes the input edge images and is suitable for evaluating the resolution characteristics of the entire imaging system, from the lens to the camera's signal processing. It also supports high-resolution images such as 8K and 4K.

This device measures the aperture diameter area of cameras and interchangeable lenses. - Aperture diameter at the time of synchronizing contacts - Maximum aperture diameter at the time of shutter release - Open aperture diameter - Aperture diameter at the start timing of aperture operation synchronization It displays the amount of aperture error (●EV) compared to the reference diameter as measurement results. The SENS sensitivity, which can be calibrated and registered using a standard lens or reference camera, has four series and supports measurements for zoom lenses and others. The measurement unit can be installed both vertically and horizontally (the angle position of the display unit can be adjusted). It allows posture difference measurements with two types of optical axes depending on the installation method. Equipped with a communication interface (RS-232C). It enables external output of measurement data and external control of the tester.