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fiber optic head

A technology of optical fiber head and optical fiber, which is applied in the field of optical fiber head, can solve the problems of increased manufacturing cost and complicated assembly operations, and achieve the effect of simple structure

Active Publication Date: 2017-03-22
ORMON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the method of fixing the lens to the case is the press-fit fixing method, it is necessary to strictly manage the dimensional accuracy of the lens and the case, and there is a problem that the manufacturing cost increases.
In addition, in the case of the press-fit fixing method, stress acts on the outer peripheral surface of the lens as the reflective surface, which may have a bad influence on the optical characteristics.
[0006] On the other hand, when the method of fixing the lens to the case is the adhesive fixing method, it is necessary to apply and cure the adhesive, so there is a problem that the assembly work is complicated and the manufacturing cost is increased.
In addition, in order to ensure a sufficient holding force of the housing to the lens, it is necessary to strictly control the amount of adhesive applied and the curing conditions, which also causes an increase in manufacturing costs.

Method used

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Experimental program
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no. 1 approach ）

[0034] figure 1 is a perspective view of an optical fiber head according to a first embodiment of the present invention, figure 2 yes figure 1 Cutaway view of the fiber tip shown. in addition, Figure 3 to Figure 5 respectively figure 1 The fiber tip shown along the figure 2 Cross-sectional views of lines III-III, IV-IV, and V-V. First, refer to Figure 1 to Figure 5 , the structure of the optical fiber head 1A of this embodiment will be described. In addition, the optical fiber head 1A of the present embodiment is configured as a projection head of a transmissive optical fiber photoelectric sensor.

[0035] Such as Figure 1 to Figure 5 As shown, the optical fiber head 1A of this embodiment has a projecting fiber 10 , a housing 20 and a projecting lens 30 .

[0036]The projecting fiber 10 transmits light to project light to the outside, and is composed of a long cylindrical member including a core wire including a core 11 and a clad 12 , and a covering member 13 co...

no. 2 approach ）

[0074] Figure 9 is a perspective view of an optical fiber head according to a second embodiment of the present invention, Figure 10 yes Figure 9 Cutaway view of the fiber tip shown. in addition, Figure 11 to Figure 13 respectively Figure 9 The fiber tip shown along the Figure 10 Sectional views of lines XI-XI, XII-XII and XIII-XIII in Figure 14 yes Figure 9 The fiber tip shown in the Figure 10 An enlarged cross-sectional view of region XIV in . Below, refer to these Figure 9 to Figure 14 , the structure of the optical fiber head 1B of this embodiment will be described. In addition, the optical fiber head 1B of the present embodiment constitutes a light emitting and receiving head of a reflective optical fiber photoelectric sensor.

[0075] Such as Figure 9 to Figure 13 As shown, the optical fiber head 1B of this embodiment has a light projecting fiber 10 , a light receiving fiber 40 , a housing 20 , a light projecting lens 30 , and a light receiving lens ...

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PUM

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Abstract

The invention provides an optical fiber head, which can securely fix a lens in a casing with a simple structure, and is cheap and easy to manufacture. The optical fiber head (1A) has a light-projecting optical fiber (10), a light-projecting lens (30), and a housing (20) for accommodating and maintaining them. The casing ( 20 ) is provided with a plugging portion ( 23 ) forming an opening portion ( 23 a ), a hole portion ( 24 ) for projecting lens insertion, and a hole portion ( 25 ) for optical fiber insertion. By fixing the projection optical fiber (10) in the casing (20) with the rear end face (30b) of the projection lens (30) in contact with the front end face (10a) of the projection optical fiber 10, the light projection The lens (30) is axially clamped by the blocking part (23) and the light-projecting optical fiber (10), thereby fixing the light-projecting lens (30) in the casing (20).

Description

technical field [0001] The present invention relates to an optical fiber head in which a front end portion of an optical fiber and a lens are held by a case, and in particular to an optical fiber head applicable to the head of an optical fiber photoelectric sensor. Background technique [0002] The optical fiber head properly controls the light emitted from the front end of the optical fiber or the light incident on the front end of the optical fiber through the lens, and the front end of the optical fiber and the lens are held by the housing to make the front end of the optical fiber and the lens. Arranged with the rear faces facing each other. [0003] Conventionally, the method of fixing the lens to the housing generally adopts a press-fit fixing method and an adhesive fixing method. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 6-160668 ) discloses an optical fiber head in which a method of fixing a lens to a housing adopts a press-fit fixing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/26G02B6/32
CPCG02B6/3853G02B6/322G02B6/32G01N21/474
Inventor 高仓毅藤井淳将
Owner ORMON CORP