K Laser Technology, Inc.

National Science Council

Shin-Gwo Shiue

Mang Ou-Yang

Ching-Fen Kao

I-Pen Chien

Hsin-Chu Liu

Jim Chung

Sheng-Tsang Chang

Shin-Maio Tseng

Tai-San Liao

Kevin Sh Kuo

The present invention provides a continuous-zoom imaging device of an interferometer. Reflected lights of a reference plane and a test plane interfere with each other to generate an interference pattern. A collimation device converts a parallel light of the interference pattern into a convergent light. An optical path adjustment means guides the light to a polarizing beam splitter. A continuous-zoom device adjusts the magnification ratio of the interference pattern on the imaging passageway and to output an object image, which is then imaged on a charge-coupled device. The present invention can improve the quality of the interference pattern without using any rotating diffuser, and thus has the characteristics of reduced number of components, lowered cost, and shrunk volume. Besides, the present invention can utilize a joint device to connect the continuous-zoom device and an attenuator so as to achieve automatic light adjustment and convenient operation.

Continuous-zoom imaging device of interferometer

The present invention proposes a transmission-type liquid crystal projection display, which comprises an incident light source, a light-separating means, three transmission-type liquid crystal display, an L-shaped dichroic polarizing prism set, an optical path adjusting means, and a projection lens. The light source provides a single polarized light. The light-separating means separates the polarized light into three colored lights of the three primary wavelengths. The three liquid crystal displays respective correspond to the three colored lights. The optical path adjusting means is used to let the three colored lights travel through the corresponding three liquid crystal displays and then be incident on the L-shaped dichroic polarizing prism set so that the three colored lights can be synthesized into a single output light beam. The projection lens projects the output light beam onto a screen. The present invention has the effects of high efficiency, low cost, and simplified fabrication process.

Projection apparatus using L-shaped dichroic prism set having a cubically glass block juxtaposed to a dichroic prism for passing light beams without changing direction of the light beams

An apparatus for measuring the curvature radii of spherical and cylindrical surfaces is provided. The apparatus comprises a base, a probe and four ball rings of the same size, wherein the four ball rings are provided on the base and arranged into a square having a side length C. The probe is upward and downward movably mounted on the top surface of the base at the center of the square. There is also provided a method for measuring the curvature radii of spherical and cylindrical surfaces, wherein a ball-ring-distance is equal to C for the cylindrical surface or is equal to .sqroot.2C for the spherical surface.

Apparatus and a method for measuring the curvature radii of spherical

Growing community of inventors

Hsinchu Hsien, Taiwan

Shin-Gwo Shiue