Seiko Epson Corporation

Tomonobu Machida

Shohei Fujisawa

Takeshi Takezawa

Hiroyuki Kobayashi

Shuji Narimatsu

Nobuo Watanabe

Shunji Umemura

Yuji Takado

Toru Terashima

Kazuhiro Tanaka

A lamp device and a projector having the lamp device eliminated of light leaking in a direction opposite to a reflecting direction at a rear end of an encapsulation fixing an arc tube on a reflection mirror is simply and inexpensively provided. An arc tube and a reflection mirror are provided. The arc tube has encapsulations one of which is inserted in a cylinder of the reflection mirror thereby securing the encapsulation and the cylinder together by an adhesive. The bulb of the arc tube and the other encapsulation are positioned on a side close to a reflection surface of the reflection mirror. The encapsulation inserted in the cylinder and positioned on a side opposite to the reflection surface has an end at least at an end face of which is covered with the adhesive thereby providing light shield.

Lamp device, manufacturing method for same and projector having a lamp device

A projection lens () comprises: a cylindrical exterior case () having a lens-shifting through-hole () on a side thereof and an inner circumferential step or inner flange (); a lens () of which outer periphery () on a first side is abutted to the inner circumferential step or inner flange (); a flexible or elastic spacer () abutted to an outer periphery () of a second side of the lens (); and a retainer () holding the spacer (), where the lens () is fixed on the exterior case ().

Projection lens, producing method of projection lens and projector having projection lens

Growing community of inventors

Shiosiri, Japan

Tomonobu Machida