发明授权
US5798992A Laser diode monitoring apparatus for determining the decay of laser diode
失效
用于确定激光二极管衰减的激光二极管监测装置
- 专利标题： Laser diode monitoring apparatus for determining the decay of laser diode
- 专利标题（中）： 用于确定激光二极管衰减的激光二极管监测装置
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申请号： US727047申请日： 1996-10-08
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公开(公告)号： US5798992A公开(公告)日： 1998-08-25
- 发明人: Shinji Kaneko , Seiji Ohura , Yoshizo Mihara , Yukio Sato
- 申请人： Shinji Kaneko , Seiji Ohura , Yoshizo Mihara , Yukio Sato
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX7-262947 19951011
- 主分类号： G11B11/10
- IPC分类号： G11B11/10 ; G11B7/125 ; G11B11/105 ; H01S5/06 ; H01S5/0683 ; G11B7/00
摘要：
A laser diode monitoring apparatus activates the laser diode in a manner of impulse, measures the sag of light output level, and judges the light emitting performance to be deteriorated if the sag is greater than the reference value. The value of sag comprehends the inequality of light output characteristics of individual laser diodes and the variation of ambient temperature, enabling the accurate decay determination.