Foxsemicon Integrated Technology, Inc.

Chao-Yi Yeh

Shan-Ju Lin

Jyh-Long Chern

Jyh-Der Hwang

Wen-Jang Jiang

An illumination device includes a cover, a heat-dissipation module, and a plurality of light emitting units. The heat-dissipation module includes a main body and a mounting plate connected to the main body. The mounting plate is received in the interior of the illumination device. The light emitting units are mounted on the mounting plate and opposite to the cover. Light from the light emitting unit is transmitted through the cover.

Illumination device

A projection lens comprises, from a long conjugate side to a short conjugate side, a first lens unit with positive optical power, a second lens unit with negative optical power, and a third lens unit with negative optical power. The first lens unit is configured for correcting chromatic aberration of the projection lens. The third lens unit comprises a meniscus lens which is convex toward to the short conjugate side of the projection lens.

Projection lens

An exemplary internally focusing lens system includes, in order from the object side to the image side, a first lens group with positive refractive power, a second lens group with negative refractive power, and a third lens group with positive refractive power. The third lens group includes one lens element. The second lens group is movable toward the image side and the first and third lens groups remain stationary during focusing of the lens system from an infinitely distant object to a nearby object.

Growing community of inventors

Miao-Li Hsien, Taiwan

Chao-Yi Yeh