Industrial Technology Research Institute

Chi-Hung Lee

Hui-Hsiung Lin

Yi-Cheng Chen

Yu-Nan Pao

Ming-Chieh Chou

Cheng-Huan Chen

Chin-Ju Hsu

Ching-Chang Chen

Jen-Hui Tsai

Po-Chou Chen

Hsiu-Chen Hsu

Kuo-Chih Wang

A code disk is adapted to an optical absolute rotary encoder. The code disk is divided into a plurality of columns, with the plurality of columns disposed in a circumferential direction around a center position and respectively extending in a plurality of radial directions. The code disk comprises a plurality of disk sectors sequentially disposed in the circumferential direction around the center position, wherein each of the disk sectors comprises a plurality of code pieces, each of the code pieces comprises an encoded value, each of the encoded values comprises a plurality of bits adopting Manchester code, these bits are arranged in one of the radial directions, and the encoded values of two of the disk sectors are arranged as Gray code.

Code disk, optical detector, optical absolute rotary encoder and encoded-value-outputting method with error detection and correction

An optical encoding device includes a light source module, an encoding disc, and a photodetector. The light source module emits a source beam. The encoding disc is disposed on a passing path of the source beam. The encoding disc has first diffracting patterns. The first diffracting patterns include a plurality of sets of first diffracting patterns arranged along a radial direction of the encoding disc. Each set of the first diffracting patterns includes a plurality kinds of first diffracting patterns having different pattern extending directions and different pattern periods. When the encoding disc is rotating, the first diffracting patterns in each set of first diffracting patterns enter the passing path of the source beam in sequence, to cause a diffraction and form diffracted beams having different angles. The photodetector receives the diffracted beams having the different angles.

Optical encoding device including an encoding disc having diffracting patterns

An optical device including a first lens array is provided. The first lens array has micro-lens units arranged in an array. An outline of each of the micro-lens units is polygonal-shaped, circular or ellipsoidal. Moreover, a projection apparatus is also provided.

Optical device and projection apparatus

A composite color separation system, comprises: a light control module, a light guide module and a light splitting module. The light control module has a lighting unit and a lens unit, in which the lighting unit includes an array of lighting elements whereas there are at least two types of lighting elements in the array for emitting at least two beams of different wavelengths. The light from the lighting unit is directed to enter the lens unit before being discharged out of the light control module. The light guide module comprises: a first light incident surface, for receiving the beams from the light control module; a first light emergence surface; and a light guide structure, for guiding the beams to the first light emergence surface where they are discharged out of the light guide module to the light splitting module. The light splitting module is used for splitting the beams.

Composite color separation system

A color separation system is disclosed, which comprises: a backlight source, being highly collimated and used for providing an incident beam; a color separation module, formed with a first color separation film for separating the incident beam basing on wavelength while deflecting the optical paths of the resulting split beams; and a beam splitting module, being configured with at least one beam splitting plate and a liquid crystal layer; wherein, the at least one beam splitting plate is used for converging the beams from the color separation module while deflecting the optical paths thereof for enabling those to be discharged thereout following a normal direction of a light emitting surface of the backlight source.

Color separation system

A composite optical dividing device can receive a light beam, which is mixed with at least multiple wavelength ranges of light. The optical dividing device includes a first optical film plate and a second optical film plate. The first optical film plate has multiple micro-structure lenses in same shape, for deflecting and the incident light with a condense level. The second optical film plate has multiple periodic polygon structures, for receiving the deflected light and dividing constitutions of the light beam, according to the wavelength ranges. Each of the multiple ranges of light respectively travels toward a predetermined region on a plane.

Composite optical dividing device

A composite optical-dividing component receives a light beam. There are mixed-bands in the light beam. The composite optical-dividing component includes a first optical-patch and a second optical-patch. The first optical-patch has multiple micro-structural lenses in an identical shape. Each micro-structural lens receives the light beam and generates a deflecting light in some degrees of condense. The second optical patch has multiple polygonal structures. Some polygonal structures are periodic and provide the function of deflection in order to receive the deflecting light and then separate multiple bands from the beam. In accordance with wavelengths in multiple bands, the bands are emitted to a target area (RGB) in a plane, respectively. Another part of the polygonal structures has the capability of light refraction, which receives the deflecting light and deflects and the rest of the bands in the beam. And it is emitted to a target area (W) in a plane.

A system for optical color division receives an incident light from a side and divides the incident light into a plurality of color lights. The system includes a light guide plate for allowing the incident light to have total internal reflection back and forth therein. A surface of the light guide plate has a plurality of microstructures, which can destroy the total internal reflection and enable the light to exit.

System for optical color division

A composite light dividing device is provided. The composite light dividing device receives a light beam mixed by lights of at least two wavebands. The composite light dividing device includes a refracting/diffracting unit, and a refracting unit. The refracting/diffracting unit is adapted for receiving the light beam and condensing the light beam into a condensed light beam, and dividing the condensed light beam at a deflection direction to obtain the lights of the wavebands. The refracting unit is adapted for deflecting the divided lights of the wavebands for outputting them from a specific direction. The composite light dividing device for example can be used in an image apparatus, and the divided lights of the wavebands can serve as primary color lights of the pixel colors.

Growing community of inventors

Hsinchu County, Taiwan

Chi-Hung Lee