Qisda Corporation

Chih-Chieh Tsung

Chien-Hung Lin

Tsung-Hsun Wu

Tzu-Huan Hsu

Sheng-Wen Hu

Chih-Ming Hu

Hsin-Jung Yeh

Meng-Yu Wu

An intraoral scanner includes a casing, a light source disposed in the casing, a reflection plate obliquely disposed in the casing for reflecting light of the light source to an object to be scanned through an opening of the casing, a transparent plate, and a receiver adjacent to the light source. A projection optical axis of the light source forms a first oblique angle with a receiving optical axis of the receiver. The receiver receives light after being incident to the object to be scanned and then reflected to the receiver by the reflection plate. The transparent plate is disposed between the light source and the reflection plate or covers the opening. The projection optical axis forms a second oblique angle with a norm of the transparent plate to make a reflection angle range of light reflected by the transparent plate fall outside a receiving angel range of the receiver.

Intraoral scanner

A lens includes a casing, a first lens group, a second lens group and a heat dissipating member. The first lens group is disposed in the casing and close to a first side of the casing. The second lens group is disposed in the casing and close to a second side of the casing, wherein the first side is opposite to the second side. The heat dissipating member is disposed at the second side of the casing and contacts the casing.

Lens and projection device

A color wheel used in a projector includes X color blocks and Y filter blocks; therein, X is an integer equal to or larger than 3. The X color blocks are defined to be arranged in an annular direction by repeating (N-1) times; therein, N is an integer equal to or larger than 2. The light permeability characteristics of the X color blocks are distinct from one another. The X color blocks correspond to X light colors respectively. The X color blocks are substantially equal in area. The Y filter blocks are formed of the X color blocks. The Y filter blocks correspond to the X light colors. One of the Y filter blocks is formed by two color blocks of one of the X color blocks.

Color wheel for projector

Growing community of inventors

Taoyuan, Taiwan

Chih-Chieh Tsung