Title:
インク液滴検出用レーザセンサおよびその組み立て方法
Document Type and Number:
Japanese Patent JP4892126
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a light emitting module where the fitting position and the fitting angle of a laser diode are prevented from being deviated, an interval between the laser diode and a condensing lens is strictly regulated, and the optical axis of a laser beam emitted from the laser diode is prevented from being inclined with respect to the condensing lens. SOLUTION: The light emitting module is provided with a frame having a light guide which is formed by penetrating the module from a rear side to a surface side; the laser diode which is mounted on a wiring board fixed to the back of the frame and is arranged on one end side of the light guide; and the condensing lens which is arranged on the other end side of the light guide, converges the laser beam emitted from the laser diode, and forms the laser beam. In the laser diode, the stem front abuts on a reference plane which is formed at the back of the frame by layer-down. An elastic sheet is inserted between the stem back of the laser diode and the wiring board in a state where the sheets are pressed in the thickness direction.
Inventors:
Masamitsu Sakamoto
Hideki Sawada
Hideki Sawada
Application Number:
JP2000119761A
Publication Date:
March 07, 2012
Filing Date:
April 20, 2000
Export Citation:
Assignee:
ROHM Co., Ltd.
Seiko Epson Corporation
Seiko Epson Corporation
International Classes:
B41J2/44; H01S5/022; H01L31/12
Domestic Patent References:
| JP7007228A | ||||
| JP10221575A | ||||
| JP61020110A | ||||
| JP4104271A | ||||
| JP11068306A | ||||
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Attorney, Agent or Firm:
Minoru Yoshida
Tatsuya Tanaka
Tatsuya Tanaka