Title:
インク液滴検出用モジュールおよびその組み立て方法
Document Type and Number:
Japanese Patent JP4539934
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a light emitting module where an interval between a condensing lens and a pin hole is strictly regulated and an irradiated laser beam is uniformly maintained to be thin for a long valid detection range. SOLUTION: The light emitting module is provided with a laser diode arranged on one end side of a light guide formed in a frame; 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; and a pin hole board which is arranged close to the opposite side of the laser diode with respect to the condensing lens, and narrows the laser beam. In the condensing lens, the peripheral edge of the incident face side enlarges the other end side of the light guide and it abuts on a reference plane formed in the frame in a step. The pin hole board is fixed to the frame so that the other end side opening of the light guide is blocked. A collar for regulating the interval of the condensing lens and the pin hole board is inserted between them.
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Inventors:
Masamitsu Sakamoto
Hideki Sawada
Hideki Sawada
Application Number:
JP2000119760A
Publication Date:
September 08, 2010
Filing Date:
April 20, 2000
Export Citation:
Assignee:
ROHM Co., Ltd.
Seiko Epson Corporation
Seiko Epson Corporation
International Classes:
B41J2/175; H01S5/022
Domestic Patent References:
| JP6175058A | ||||
| JP7086681A | ||||
| JP11023980A | ||||
| JP11052230A | ||||
| JP2059717A | ||||
| JP10331832A | ||||
| JP59020608U | ||||
| JP11142696A | ||||
| JP4104271A | ||||
| JP7012647A | ||||
| JP9214023A | ||||
| JP1099275A | ||||
| JP11204876A |
Attorney, Agent or Firm:
Minoru Yoshida
Tatsuya Tanaka
Yoshikazu Fukumoto
Tatsuya Tanaka
Yoshikazu Fukumoto