Industrial Technology Research Institute

Ming-Lang Tsai

Hui-Lung Kuo

Chun-Hsun Chu

Chun-Hsiang Wen

Yaw-Ting Wu

Yii-Tay Chiou

Chih-Kung Lee

Ping-Chen Chen

Liang-Bin Yu

Bor-Chen Tsai

Kuo-Tung Huang

Jung-Tai Chen

Yu-Hsun Wu

Chih-Hsiang Ko

Ying-Chiang Hu

Jin-Sheng Chang

Zong-Yuan Wu

Chin-Sheng Chang

An-Shun Liu

Chih-Kng Lee

Ming Jie Chou

The apparatus for sensing plural gases is substantially a gas sensor adopting planar lightwave circuit for constructing reference optical path and sensing optical path, which is a flat structure with abilities of high accuracy, long-term stability, and short response time. The gas sensor can be widely applied for monitoring the safety of a working environment, securing the safety of workers, alerting potential hazard in a factory, inspecting harmful materials in a specific area, testing leakage of a pipeline, inspecting waste gas exhausted from automobile/motorcycle, and monitoring the living quality of household environment.

Apparatus for sensing plural gases

A fiber waveguide optical subassembly uses the multi-mode fiber to increase the alignment tolerance between the active optical element and the waveguide. The filter is thinner to lower the dispersion due to the optical coupling gap. The subassembly further combines the optical bench to achieve passive positioning. Therefore it reduces the cost and enhances the transmission rate.

Fiber waveguide optical subassembly module

A solution for fabricating a light diffusing sheet-like device capable of emitting light with superior brightness, that is a high brightness diffuser. The high brightness diffuser mainly includes at least two light diffusing pieces with ridge-shape structure arranged thereon, which can be either convex or concave. The convex ridge-shape structure having a plurality of large convex ridges and a plurality of small convex ridges, which are associated with a ridgeline existing in between two adjacent ridges where the large ridge and small are interlace-arranged, and the ridges along with the associated ridgelines can be longitudinally extended to the same direction. The concave ridge-shape structure is constituted the same way as the convex ridge-shape structure is, but having concave ridges. The high brightness diffuser is fabricated by stacking up the two light diffusing pieces and enabling an included angle to be formed between the two ridge-extending directions of the two light diffusing pieces.

High brightness diffuser

The light-guide module for emitting particular polarized light beams includes a splitter for separating non-polarized light beams, a transformer for converting polarization of light beams, and a non-polarized light source. The non-polarized light source emits light beams. Particular polarized light beams pass the splitter and other light beams are reflected by the splitter. Polarizations of reflected light beams and of light beams emitted by the non-polarized light source are converted by the transformer so as to separate the light beams later. Thus the light-guide module for emitting particular polarized light beams loses relatively little light energy.

Light-guide module for emitting particular polarized light beams

Growing community of inventors

Hsinchu, Taiwan

Ming-Lang Tsai