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Eye-safe light source and method for manufacturing same

A technology of human eye safety and manufacturing method, which is applied in the direction of lasers, semiconductor lasers, laser components, etc., can solve problems such as metal wire breakage, sudden failure, and inability to supply power to semiconductor lasers 1100, so as to prevent the loss of human eye safety Effect

Inactive Publication Date: 2018-11-23
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Therefore, in Figure 16 (a) In the structure in which the semiconductor laser 1100 is directly sealed with the resin 1120 mixed with a light scatterer at a high concentration, there are the following problems: (i) the semiconductor laser 1100 is subjected to high stress from the sealing resin 1120, and the semiconductor laser Defects increase in 1100, so the semiconductor laser 1100 will suddenly fail; (ii) a crack occurs in the sealing resin 1120, and the metal wire connected to the semiconductor laser 1100 is broken due to the crack, so it is impossible to supply power to the semiconductor laser 1100; and ( iii) Near the light-emitting end face of the semiconductor laser 1100, the laser light is concentrated in a few μm 2 ~ tens of μm 2 Such a small area, so the light scatterer contained in the sealing resin 1120 absorbs a small amount of laser light, thereby causing a local temperature rise, and the light-emitting end face of the semiconductor laser 1100 becomes high temperature, so catastrophic optical damage (Catastrophic Optical Damage, COD) is prone to occur. )

Method used

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  • Eye-safe light source and method for manufacturing same
  • Eye-safe light source and method for manufacturing same
  • Eye-safe light source and method for manufacturing same

Examples

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Embodiment approach 1

[0038] Below, based on Figure 1 to Figure 7 Embodiment 1 of the present invention will be described in detail.

[0039] figure 1It is a cross-sectional view showing a schematic configuration of an eye-safe light source 1 according to Embodiment 1 of the present invention. Hereinafter, the direction in which the eye-safe light source 1 emits light from the opening 124 of the concave portion 120 will be described as upward, but the direction of the eye-safe light source 1 during manufacture and use is not intended to be limited.

[0040] like figure 1 As shown, the eye-safe light source 1 has: a semiconductor laser 100, which emits laser light 114 from the left light-emitting end face 100l and the right light-emitting end face 100r; the base 102, for placing the semiconductor laser 100; The metal wire 110 is connected to the semiconductor laser 100; the transparent resin layer 140 (sealing resin, the first resin after curing) is formed by curing the liquid resin filled in ...

example 1

[0137] Below, based on Image 6 The cover 150a as the first modification of the cover 150 included in the eye-safe light source 1 of the first embodiment will be described.

[0138] Image 6 is meant as image 3 A diagram showing a schematic configuration of a cover 150a according to Variation 1 of the cover 150 shown. Image 6 (a) represents a top view, Image 6 (b) means Image 6 (a) AA arrow sectional view, Image 6 (c) means Image 6 (a) BB arrow cross-sectional view, Image 6 (d) shows a bottom view.

[0139] like Image 6 As shown, the cover 150a of this modification 1 has, like the cover 150, a left vent hole 152l, a right vent hole 152r, a resin filling hole 154, a stepped portion 156, and a hook portion 158a. The cover 150a as the present modification 1 is different from the above-mentioned cover 150 in the hook portion 158a.

[0140] In the cover 150 , the hook portion 158 is continuously provided around the resin filling hole 154 . On the other hand, in t...

Embodiment approach 2

[0158] if based on Figure 9 Another embodiment of the present invention will be described as follows. In addition, for convenience of description, components having the same functions as those described in the above-described embodiments are assigned the same reference numerals and their descriptions are omitted.

[0159] Figure 9 It is a figure which shows the schematic structure of the eye-safe light source 2 which concerns on Embodiment 2 of this invention. Figure 9 (a) represents a sectional view of the eye-safe light source 2, Figure 9 (b) represents a top view of the eye-safe light source 2, Figure 9 (c) shows a top view of the eye-safe light source 2 after the cover 250 and the transparent resin layer 140 are removed. therefore, Figure 9 (c) shows the schematic configuration of the package 208 included in the eye-safe light source and the schematic arrangement of the semiconductor laser 100 with respect to the package 208 . Hereinafter, the direction in whic...

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Abstract

Realized is an eye-safe light source which has a long life and has a lid that is not easily detached from a container. According to the present invention, a cover (150) is fixed to a package (108) bya transparent resin layer (140) that seals a semiconductor layer (100). A concave part (120) having a bottom surface (123) on which the semiconductor layer (100) is placed, a reflective surface (116)on which laser light (114) is reflected, and an opening (124) through which the reflected laser light (114) is radiated, is provided in the package (108). The cover (150) covers the opening (124). Thetransparent resin layer (140) is provided in the concave part (120).

Description

technical field [0001] The present invention relates to an eye-safe light source, an electronic device with the eye-safe light source, and a manufacturing method of the eye-safe light source. Background technique [0002] In recent years, wireless optical communication modules represented by IrDA (Infrared Data Association) and optical sensor modules have been widely installed in electronic devices such as mobile phones and notebook computers. For example, Patent Document 1 discloses an optical proximity sensor (reflective optical coupling device) mounted on a mobile phone. [0003] Light sources for wireless optical communication and optical sensing must be eye-safe (eye-safe). In addition, in order to use it in wireless optical communication, optical sensing, etc., it is necessary to adjust the light distribution. [0004] Patent Document 2 discloses "a light source device capable of ensuring eye safety even if a high-output semiconductor laser is used as a light source ...

Claims

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Application Information

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IPC IPC(8): H01S5/022H01S5/0232
CPCH01L2224/48091H01L2224/48247H01L2224/48257H01S5/02208H01S5/0287H01S5/02234H01S5/0231H01S5/02345H01S5/02255H01S5/02257H01S5/0232H01L2924/00014H01S5/028
Inventor 伊藤晋
Owner SHARP KK