オプト企業 List of Products and Services

The rheometer necessary for the rheological property analysis of substances that cannot be solved with a simple viscometer is expensive and requires complex operational skills. The introduction of a rheometer involves cumbersome tasks related to budget applications, and after installation, there are additional burdens such as equipment maintenance and management, operator costs, and running costs, which necessitate spending time and effort on various matters outside of the core work. In response to customer concerns and requests such as "It would be great if we could just solve this problem," "I want to clarify the issue as quickly as possible," and "We don't have the budget for rheometer equipment," Opto Corporation will provide solutions through contracted testing and measurement.

• Rubber
• Lamps and light emitting devices
• filter

This is a notice from Opt Corporation regarding the "Glass Testing Machine - Glass Strain Measurement Device."

• Testing Equipment and Devices
• Image Processing Equipment

This is a notice from Opt Corporation regarding the "Glass Testing Machine Glass Strain Tester."

• Testing Equipment and Devices
• Image Processing Equipment

This is a device for measuring the electrical conductivity (resistivity) of glass melts at high temperatures. The measurement of the electrical conductivity of the melt is performed using a two-electrode method, but this method is said to have many sources of error. This device uses parallel plate electrodes, and since the sample sandwiched between them is small in quantity, the distance between the electrodes is small, resulting in almost no error in temperature measurement. Reference: Ceramics Association Journal: Terai, Wakabayashi 91 [7] 1983

• Testing Equipment and Devices
• Image Processing Equipment

A rotational cylindrical viscometer is used as a measurement method for the low viscosity range of glass. This involves immersing a cylinder into a molten sample and measuring the torque generated by rotating either the inner or outer cylinder to determine the viscosity. In this case, a certain amount of sample is required, and the container for melting it, as well as the furnace for melting, need to be of a corresponding size. For example, when verifying the temperature dependence of glass viscosity, it is preferable to minimize the sample volume and use a heating furnace that responds well to temperature changes. Therefore, this viscometer adopts a parallel plate rotation method that allows viscosity measurement with a small amount of sample and has been designed to keep the heating furnace as compact as possible. "References" Hiroshi Shiraishi et al.: Journal of the Japan Institute of Metals, Vol. 60, No. 2 (1996) 184-194

• Testing Equipment and Devices
• Image Processing Equipment

This device measures viscosity in a vacuum, in a gas atmosphere, and at high temperatures. Viscosity measurement involves measuring the deformation speed of the sample and the shear rate; however, conventional sensor heads require detection rods and rotating shafts to be non-contact with the structure, which makes it impossible to achieve a complete seal, resulting in measurements being conducted in a flowing gas atmosphere. This device adopts an indentation, parallel plate, and rotational method, allowing for a smaller sample shape and a more compact measurement sensor section, making it possible to house the entire measurement mechanism, including the electric furnace, within a vacuum cell. [Reference] Hiroshi Shiraishi et al.: Journal of the Japan Institute of Metals, Vol. 60, No. 2 (1996) 184-191

• Testing Equipment and Devices
• Image Processing Equipment

In viscosity measurement, the conventional range of 10^3 to 10^11 Poise (10^2 to 10^10 Pa.s) spans three measurement principles, necessitating the use of three different devices. Additionally, there was the hassle of connecting each measurement result to obtain the desired temperature-viscosity characteristic curve. This device overcomes these issues and aims for rationalization as a single unit. "References" Hiroshi Shiraishi et al.: Journal of the Japan Institute of Metals, Vol. 60, No. 2 (1996) 184-191

• Testing Equipment and Devices
• Image Processing Equipment

This viscometer is a device for measuring the viscosity in the glass transition and strain point regions, employing the beam bending method and conforming to ISO 7884/4 and 7884/7. In the JIS standards, it is listed as a standard in "Measurement Methods for Glass Transition and Strain Points by Fiber Stretching Method JISR 3103-2" (Appendix 1).

• Testing Equipment and Devices
• Image Processing Equipment

This device is a glass viscometer that employs the penetration method. The conventional needle penetration method has been used for measuring in the high viscosity range (around 10^10 Pa·s), but this viscometer is a new measurement device that can measure from the molten state to the solidified state. In the low viscosity range (10^2 to 10^8 Pa·s), viscosity is measured by controlling the penetration speed and measuring the resistance (load) applied at that time. Reference: Michimata Yuu, Matsushita Kazumasa, Journal of the Ceramic Society of Japan 105[7]620-623 (1997)

• Testing Equipment and Devices
• Image Processing Equipment

It is a device commonly referred to as an internal cylinder rotational viscometer, which rotates an internal cylinder in a molten liquid within an outer cylinder container and measures the generated torque to determine the viscosity of glass.

• Testing Equipment and Devices
• Image Processing Equipment

For measuring the viscosity of molten salts in high-temperature conditions, there are methods such as the ball uplift method and the rotating cylinder method (inner cylinder rotation type and outer cylinder rotation type). This glass viscometer belongs to the outer cylinder rotation type, and it is a device that allows for the direct measurement of the torque generated on the inner cylinder (sensor) by rotating the outer cylinder using a load cell. Compared to conventional glass viscometers, it enables measurements that are closer to the absolute viscosity values. [Reference] Hiroshi Shiraishi, Takeshi Fujii: Report No. 1868 of the Tohoku University Steelmaking Research Institute (1991)

• Testing Equipment and Devices
• Image Processing Equipment

In the ball lift-type viscosity measurement, after several years of changing the measurement system from the variable deformation of the weights of the viscosity balance to a variable speed lift of a suspended ball balance (patent published in March 1993), the latter method has generally been recognized. The ball lift-type high-temperature viscometer BVM-13LH further advances the advantages of this balance lift system. This glass viscometer adopts a touch panel sequencer, resolving all the shortcomings and complexities of conventional glass viscometers, allowing for fully automated measurements and immediate evaluation of results after measurement.

• Testing Equipment and Devices
• Image Processing Equipment

This glass viscometer is a device that solves the drawbacks of the conventional ball uplift method, such as cumbersome balance operations and individual differences in measurement results. It utilizes an electronic balance (load cell scale) to raise and lower the balance body at a constant speed, measuring the viscous drag on the suspended ball to determine viscosity. (Patent pending)

• Testing Equipment and Devices
• Image Processing Equipment

In conventional glass viscosity measurements, the range of 10^4 Pa.s (10^5 poise) is difficult to measure with rotational methods, and the sample preparation for the softening point measurement method according to JIS-R3103-1 was not easy. This glass viscometer is a device that continuously measures from 10^3 to 10^8 Pa.s (10^4 to 10^9 poise) using the parallel plate measurement method, which heats and applies pressure to samples with parallel surfaces. [Reference] Hiroshi Shiraishi, R. Meister: Report No. 868 of the Tohoku University Institute of Mineral Processing and Metallurgy, (1982)

• Testing Equipment and Devices
• Image Processing Equipment

This device is automated according to JIS-R3103-2 "Test Method for Glass Strain Point" and R3103-1 "Test Method for Glass Softening Point." Based on the automatic measurement devices for glass softening point and glass annealing point/strain point, it shares a power supply and temperature controller as a single unit, and performs automatic operation via a PC to determine each measurement value.

• Testing Equipment and Devices
• Image Processing Equipment

This device complies with JIS-R3103-1 "Glass Softening Point Test Method" (ISO 7884-6:1987, ASTM C338) and inherits the measurement principles and sample preparation directly from JIS, while automating the direct reading process. Additionally, the measurement program operation is conducted via a touch panel, and the measurement results can be printed out from a printer.

• Other process controls

This device is used to test the glass's devitrification (crystallization) properties. A platinum sample plate with holes is placed in a nearly linear temperature gradient furnace, and glass particles of approximately 20 mesh are arranged, allowing for the testing of devitrification areas, liquid phase temperatures, etc., after being heated for a certain period of time.

• Other measurement, recording and measuring instruments

This viscometer is automated and complies with JIS-R3103-2 "Measurement Method for Softening Point and Strain Point by Fiber Stretching Method." The measurement of the glass strain point is determined by suspending a glass thread with a diameter of 0.65 mm and a length of 100 mm in a circular furnace using a quartz supporter, and measuring the change in elongation under a temperature drop condition with a load of approximately 1 kg applied.

• Viscometer

This device complies with JIS-R3103-1 "Glass Softening Point Test Method" (ISO7884-6:1987, ASTM C338), inheriting the measurement principles and sample preparation directly from JIS, and has been automated for direct reading.

• Other measurement, recording and measuring instruments

This is a device for measuring the viscosity of molten liquids at high temperatures, using a ball pull-up method. We have developed the "BVM-13LH," which solves the issues of cumbersome balance operations and individual differences in measurement results associated with conventional ball pull-up viscometers, and further advanced it to create a device capable of measurements in a high-temperature environment of 2400°C.

• Viscometer

The SV-200Q quantitatively measures the internal residual strain in transparent glass or plastic.

• Testing Equipment and Devices
• Image Processing Equipment