发明名称 |
Device for producing ring-shaped laser spot |
摘要 |
The present invention relates to a projector using laser light, and more particularly to a ring-shaped laser spot capable of forming a projected image having a ring-shaped projected image formed from a diffraction fringe, by interposing a diaphragm between a collimator lens and a target. The collimator lens transmits laser light emitted from a laser light source to the target to form a first projected image on the target. The diaphragm shapes the laser light transmitted through the collimator lens to form a ring-shaped second projected image as a diffraction fringe on the target.
|
申请公布号 |
US5638220(A) |
申请公布日期 |
1997.06.10 |
申请号 |
US19950492743 |
申请日期 |
1995.06.21 |
申请人 |
KABUSHIKI KAISHA TOPCON |
发明人 |
OHTOMO, FUMIO;SUGAI, HIROO;OGAWA, YOUHEI;ENOMOTO, YOSHIYUKI |
分类号 |
G01C15/00;G02B27/09;G02B27/30;G02B27/58;(IPC1-7):G02B27/09 |
主分类号 |
G01C15/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|