TWI612692B - Optical device - Google Patents

Abstract

The present invention provides an optical device comprising a first optical element having a first optical axis and a second optical element having a second optical axis. The first optical element is sleeved on the second optical element. There is no adhesive between the first optical element and the second optical element. The first optical element covers a pair of laser solder joints on opposite sides of the second optical element. The first optical axis and the second optical axis have an alignment error of no more than 0.5 micrometers.

Description

Optical device

This invention relates to optical devices and, more particularly, to optical devices for connecting or securing optical elements using laser welding.

Assembly between the optical components of an optical device typically has stringent positioning requirements. A common practice is to use an ultraviolet light bonding agent to connect or fix optical elements, but there are some problems. For example, it is necessary to irradiate ultraviolet light for curing, and manual dispensing is required to improve the yield, which is time consuming and labor intensive. Another method is to use laser welding to connect or fix optical components. It is more time-saving, easy to automate and has strong connection strength. However, laser welding generates stress between optical components, which causes the position of optical components to be biased. shift. Therefore, a method has been developed to firstly use an adhesive and then use laser welding to connect or fix optical components. For example, Taiwan Patent No. I386268 can improve the positional deviation of optical components caused by laser welding. But it is more time consuming and costly.

In view of the above, an object of the present invention is to propose an optical device which uses only laser welding to connect or fix optical elements, so that the positional shift of the optical element after soldering is not excessively enlarged.

To achieve the above object, the present invention provides an optical device comprising a first optical element having a first optical axis and a second optical element having a second optical axis. The first optical element is sleeved on the second optical element. There is no adhesive between the first optical element and the second optical element. The first optical element covers a pair of laser solder joints on opposite sides of the second optical element. The first optical axis and the second optical axis have an alignment error of no more than 0.5 micrometer (um).

The invention further provides an optical device comprising an optical unit and a carrier element. The optical unit includes two optical axes having an alignment error of no more than 0.5 micrometers and is disposed on the first surface of the carrier member. The second surface of the carrier member forms a row of laser solder joints at one of the corresponding optical units.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

1‧‧‧Optical device

11‧‧‧First optical component

111‧‧‧ lens holder

112‧‧‧ lens

113‧‧‧ side

114‧‧‧Laser solder joints

12‧‧‧Second optical component

121‧‧‧ diode bracket

122‧‧‧Laser diode

2‧‧‧Optical device

21‧‧‧ Optical unit

22‧‧‧Loading components

221‧‧‧ first surface

222‧‧‧ second surface

223‧‧‧Ray solder joints

1 is an exploded view of an optical device according to a first embodiment of the present invention; FIG. 2 is a perspective view of an optical device according to a first embodiment of the present invention; and FIG. 3 is a cross-sectional view of the optical device according to the first embodiment of the present invention; And Figure 4 is an assembled view of an optical device in accordance with a second embodiment of the present invention.

1 to 3 are an exploded view, an assembled view, and a cross-sectional view, respectively, of an optical device according to a first embodiment of the present invention. Referring to FIGS. 1 through 3 together, the optical device 1 includes a first optical element 11 having a first optical axis and a second optical element 12 having a second optical axis. The optical element may be a light-emitting element having an optical axis, or a lens. In the present embodiment, the first optical element 11 is a lens element including a lens The bracket 111 and the lens 112 provided in the lens holder 111. The first optical axis of the first optical element 11 is the optical axis of the lens 112. The second optical component 12 is a laser component, and includes a diode holder 121 and a laser diode 122 disposed on the diode holder 121. The second optical axis of the second optical element 12 is the optical axis of the laser diode 122.

As shown in FIGS. 2 and 3, the first optical element 11 is sleeved on the second optical element 12. The first optical element 11 covers the opposite side faces 113 of the second optical element 12 to form a column of laser solder joints 114 (possibly black circular spots), and the first optical axis and the second optical of the first optical element 11 The second optical axis alignment error of component 12 is no more than 0.5 um to conform to the specifications of the positional positioning of the optical components. At the point of the laser solder joint 114, the first optical element 11 and the second optical element 12 are melted to be connected or fixed together as schematically illustrated in FIG. Further, there is no adhesive between the first optical element 11 and the second optical element 12.

4 is a perspective view of an optical device in accordance with a second embodiment of the present invention. Referring to FIG. 4, the optical device 2 includes an optical unit 21 and a carrier member 22. In the present embodiment, the optical unit 21 includes three optical devices 1 as disclosed in the first embodiment, for example, for emitting red light, green light, and blue light, respectively. The optical device 1 includes optical axes having two alignment errors of no more than 0.5 micrometers. The carrier element 22 has opposite surfaces, namely a first surface 221 and a second surface 222. The optical unit 21 is disposed on the first surface 221 of the carrier element 22. The second surface 222 of the carrier member 22 forms a row of laser solder joints 223 corresponding to each of the optical units 21, and the laser solder joints 223 may be a straight line or an irregular line. At the laser solder joint 223, the optical unit 21 and the carrier element 22 are melted to be joined or fixed together. In addition, there is no adhesive between the optical unit 21 and the carrier element 22.

In summary, the present invention forms a row of laser pads 114 on opposite sides 113 of the first optical element 11 overlying the second optical element 12, or by opposing the second surface 222 of the carrier element 22. A row of laser solder joints 223 is formed at one of the corresponding optical units 21, so that the specifications of the optical element or optical unit positional positioning can be maintained.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. The scope of protection is subject to the definition of the scope of the attached patent application.

1‧‧‧Optical device

11‧‧‧First optical component

111‧‧‧ lens holder

113‧‧‧ side

114‧‧‧Laser solder joints

12‧‧‧Second optical component

121‧‧‧ diode bracket

122‧‧‧Laser diode

Claims (4)

An optical device comprising: a first optical component having a first optical axis; and a second optical component having a second optical axis, wherein the first optical component is sleeved on the second optical component An adhesive is not disposed between the first optical component and the second optical component, and the first optical component covers a pair of laser solder joints on opposite sides of the second optical component, and the first optical axis And the second optical axis alignment error is no more than 0.5 micron. The optical device of claim 1, wherein the first optical component comprises a lens component and the second optical component comprises a laser component. An optical device comprising: an optical unit comprising a first optical component and a second optical component, the first optical component being sleeved between the second optical component, the first optical component and the second optical component a non-adhesive agent, the first optical element enclosing a pair of laser solder joints on opposite sides of the second optical component; and a carrier component, wherein the optical axis of the first optical component and the second optics The alignment error of the optical axis of the component is not more than 0.5 micrometer, and the optical unit is disposed on one of the first surfaces of the carrier component, and the carrier component is opposite to the second surface to form a row of lightning at one of the optical units Spot welding point. The optical device of claim 3, wherein the first optical component comprises a lens component, and the second optical component comprises a laser component.