JPH0215759U

JPH0215759U -

Info

Publication number: JPH0215759U
Application number: JP9314088U
Authority: JP
Priority date: 1988-07-14
Filing date: 1988-07-14
Publication date: 1990-01-31

Description

[Brief explanation of drawings]

第１図はこの考案の半導体レーザ光学ヘツドの
一実施例を示す正面図、第２図は中央縦断面図、
第３図は半導体レーザ光学ヘツドの温度を制御す
るための電気的構成を示すブロツク図、第４図は
温度制御例を説明する図、第５図Ａは従来例を示
す中央縦断面図、第５図Ｂは従来例を示す正面図
、第６図は他の従来例を示す中央縦断面図。１……恒温ブロツク、２……ＬＤブロツク、３
……中心孔、４……ペルチエ素子、６……コリメ
ータレンズ、７……熱絶縁層、８……スレツパプ
レート、１０……サーミスタ。 FIG. 1 is a front view showing an embodiment of the semiconductor laser optical head of this invention, FIG. 2 is a central vertical sectional view,
3 is a block diagram showing an electrical configuration for controlling the temperature of a semiconductor laser optical head, FIG. 4 is a diagram illustrating an example of temperature control, FIG. 5A is a central vertical sectional view showing a conventional example, FIG. 5B is a front view showing a conventional example, and FIG. 6 is a central vertical sectional view showing another conventional example. 1... Constant temperature block, 2... LD block, 3
... center hole, 4 ... Peltier element, 6 ... collimator lens, 7 ... heat insulating layer, 8 ... stress plate, 10 ... thermistor.

Claims

[Claims for Utility Model Registration] 1 A semiconductor laser 2 and a thermal element 4 are installed on both bottom surfaces of a cylindrical constant temperature block 1 with good thermal conductivity.
are provided symmetrically around the center hole 3 of the constant temperature block 1, and at least the constant temperature block 1
1. A semiconductor laser optical head characterized in that a thermal insulating layer 7 is provided to cover the outer peripheral surface of the constant temperature block 1, and a temperature detection element 10 is provided at a predetermined position in close contact with the semiconductor laser 2 of the constant temperature block 1. 2. The scope of the above utility model registration claim, in which the collimator lens 6 is disposed directly facing the semiconductor laser 2, and a thermal insulation layer 7 is provided that also covers the optical path between the collimator lens 6 and the semiconductor laser 2. 2. The semiconductor laser optical head according to claim 1.