Industrial Technology Research Institute

Kuang-Vu Chen

Fu-Ming Chuang

Kuo-Tung Tiao

Jinn-Chou Yoo

Yen-Chang Wang

Han-Ping D Shieh

Kun-Wei Lin

Hsin-Yueh Sung

Chuan-Chung Chang

Chong-Min Chang

San-Ming Chen

An illumination apparatus includes an outer tube, an inner tube, and a light source. The outer tube has a reflecting inner wall. The inner tube is disposed in the outer tube and coaxial with the outer tube. The inner tube has a reflecting outer wall. A ring-shaped light channel is formed between the outer tube and the inner tube. The ring-shaped light channel has a light entrance and a light exit corresponding to two ends of the outer tube respectively. A segment of the inner tube protrudes from the light exit. The light source is disposed at the light entrance. A light beam emitted from the light source enters the ring-shaped light channel through the light entrance, is reflected multiple times by the reflecting inner wall of the outer tube and the reflecting outer wall of the inner tube, and travels out of the illumination apparatus through the light exit.

Illumination apparatus

An image pickup device including an imaging lens, an image sensor, and a multiple aperture optical element is provided. The multiple aperture optical element is disposed on a light path between the imaging lens and the image sensor, and includes aperture elements arranged in an array. A ratio of an image side f-number of the imaging lens to an object side f-number of the imaging lens is within a range of 0.25 to 2. A light field image pickup lens is also provided.

Image pickup device and light field image pickup lens

A reading device for holographic storage includes a light source, a light-directing component, an optical sensor and a prism. The light-directing component is disposed on the transmission path of the light beam provided by the light source and directs the light beam to get incidence at a holographic storage medium in a reading angle to generate a data beam. The optical sensor is suitable for reading the data beam and reproducing stored data. The prism is disposed between the light source and the holographic storage medium and rotatable about a rotation axis perpendicular to the transmission path of the light beam for fine-adjusting the reading angle. The prism and the light beam satisfy the following formula:&#x221a;{square root over (&#x2212;sin)}&#xd7;sin&#x2212;cossin&#x3c;1 Iis the angle of incidence of the light beam, A is the vertex angle between the light incident surface and the light emerging surface and n is the refractive index of the prism.

Device for holographic storage

An illumination device and an image display apparatus using the same. The illumination device comprising a light source, an illumination uniformizing device, and a polarization converter. The image display apparatus comprises an illumination device provided in the invention, a synthesizing device, and a projection device.

Illumination device and image projection apparatus comprising the device

An image display is illuminated by a light source employing a plurality of low power light emitting devices. The lifetime and light intensity of the light sourceare increased by orders of magnitude. The illumination provided by the light source is made uniform to efficiently utilize the light source and so obtain optimum projection results.

A liquid-crystal projection display system with higher efficiency is provided. The liquid-crystal projection display system comprises a double-layer square-pillar-like integrator, including an inner layer and an outer layer, having a polarization-separating thin film formed between the inner layer and the outer layer. The system also includes a converging light source for generating light converged at a point near one end surface of the double-layer square-pillar-like integrator, so that most light emitted from the light source enters the double-layer square-pillar-like integrator, and different polarized light is transmitted by being totally reflected off of surfaces of the inner layer and the outer layer respectively. A first lens is provided for forming real light spots on an image plane from virtual light spots formed by totally reflecting the different polarized light transmitted in the double-layer square-pillar-like integrator. A polarization rotator is located at the image plane, for rotating one of the polarizations of the real light spots, while keeping another one of the polarizations unchanged, so that the polarization angles of all the real light spots are identical. A second lens is provided for evenly converging and projecting light beams from the light spots with an identical linear polarization to overlay on an object.

Growing community of inventors

Taipei, Taiwan

Kuang-Vu Chen