| JP3895536 | MIRROR SUPPORT STRUCTURE |
| JP2001255483 | OPTICAL SCANNER |
| WO/1992/012450 | IMPROVED OPTICAL MOUNTING APPARATUS |
| EP4092461A1 | 2022-11-23 | |||
| US20050052619A1 | 2005-03-10 | |||
| US20210285622A1 | 2021-09-16 | |||
| US20060262821A1 | 2006-11-23 |
YODER, PAUL R: "Mounting Optics in Optical Instruments", 2008, SPIE PRESS, pages: 581 - 628
| Claims 1. Optoelectronic module (10), for example, laser projector, comprising an optical component (11 , 12), such as a mirror (11) or dichroic filter (12), joined on a mounting surface (13) of the module (10), characterized in that the component (11 , 12) is joined through an adhesive. 2. Module (10) as per Claim 1. wherein the adhesive is chemically reactive. 3. Module (10) as per Claim 2. wherein the adhesive consists of at least two components. 4. Module (10) as per Claim 3. wherein one of the components is polyurethane resin. 5. Module (10) as per any of the preceding claims, comprising a pedestal (14) bearing the component (11 , 12) and joined to the surface (13) by the adhesive. 6. Module (10) as per any of the preceding claims, wherein the surface (13) exhibits a recess (15) filled with the adhesive. 7. Module (10) as per any of the preceding claims, wherein the component (11 , 12) is partly immersed in the adhesive. 8. Module (10) as per any of the preceding claims, comprising a baseboard (16) exhibiting the surface (13). 9. Module (10) as per Claim 8. comprising a trough (17), such as of an aluminum alloy, affixed on the baseboard (16) and filled with the adhesive. Module (10) as per Claim 9. comprising a cube (18) affixed, preferably screwed, on the trough (17) and preferably immersed in the adhesive. Module (10) as per Claim 10. comprising a holder (19) mounted to the cube (18), preferably immersed in the adhesive, and holding the component (11 , 12). Module (10) as per Claim 11. the holder (19) is mounted kinematically by means of setscrews (20) connecting the holder (19) and cube (18). Module (10) as per Claim 12. comprising a screw (21), such as an M3 screw, connecting the trough (17) and baseboard (16) and having a head embedded in the adhesive. Module (10) as per Claim 13. comprising an oblong hole (22) for aligning the trough (17) with respect to the baseboard (16). Process for the manufacture of a module (10) as per Claim 14. comprising mounting the holder (19) unto the cube (18), screwing the cube (18) onto the trough (17), aligning the trough (17), preferably by eye, through the hole (22), affixing the trough (17) using the screw (21), setting the component (11 , 12) using the setscrews (20), filling the trough (17) with the adhesive, and curing the adhesive, preferably at constant temperature, while the component (11 , 12) is immersed therein. |
Optoelectronic module and process for the manufacture thereof Technical Field
[0001] The invention relates to the product and process as per the first portion of the independent claims.
Background Art
[0002] By laser diode (LD), injection laser diode (ILD), or diode laser is meant any semiconductor device in which a light-emitting diode pumped directly with electrical current creates lasing conditions at its junction. NPL1 provides a comprehensive treatment of these and other photonic integrated circuits.
[0003] Diode array modules are commonly employed in laser light shows, that is, visual displays wherein substantially collimated beams of coherent light generated by one or more laser sources are projected aerially or scanned in two dimensions, usually with oscillating mirrors, to produce visible images on a projection surface. Differing substantially from conventional cinema and video area-filling displays, laser-light show images typically consist of high-contrast outline renderings and silhouettes. Images are produced by a vector graphics scanning method and retain the distinguishing properties of coherent laser light, namely its collimation, monochromaticity, or pure hue(s), and its fine interference patterns, or speckle. PTL1 discloses such method.
Summary of invention
[0004] The invention is set out in the appended set of claims.
Technical Problem
[0005] In display and other high-power laser systems, white light is produced by superimposing individual color channels such as red, green, and blue. This superposition is effected by beam combiners based on mirrors or dichroic filters in small holders that, when being transported, tend to misalign. Furthermore, heat dissipation causes nonuniform expansion or contraction of integral or connected components. These and other adverse effects are laid out in NPL2 and, if color fringing is to be avoided, necessitate realignment of optical components prior to each use.
Solution to Problem [0006] The problem is solved as per the second portion of Claim 1.
Advantageous effect of invention
[0007] The invention provides for an essentially maintenance-free optoelectronic module. In a preferred embodiment, the module will resist misalignment across a temperature range of -36 °C to +110 °C.
Brief description of drawings
[0008] Figure 1 is a perspective view of a first optoelectronic module.
[0009] Figure 2 is a perspective view of a second optoelectronic module.
[0010] Figure 3 is a perspective view of a first trough.
[0011] Figure 4 is a top view of the first trough.
[0012] Figure 5 is a front view of the first trough.
[0013] Figure 6 is a side view of the first trough.
[0014] Figure 7 is a section taken along the line A-A of
[0015] Figure 8 is a perspective view of a second trough.
[0016] Figure 9 is a top view of the second trough.
[0017] Figure 10 is a front view of the second trough.
[0018] Figure 11 is a side view of the second trough.
[0019] Figure 12 is a section taken along the line A-A of
[0020] Figure 13 is a perspective view of a third trough.
[0021] Figure 14 is a top view of the third trough.
[0022] Figure 15 is a front view of the third trough.
[0023] Figure 16 is a side view of the third trough.
[0024] Figure 17 is a section taken along the line A-A of
[0025] All dimensions are given in millimeters.
Description of embodiments
[0026] Figure 1 illustrates a module (10) for linear combination of five laser beams through knife edging. Here, each of the five small mirrors (11) used for knife-edge adjustment is installed on a rectangular pedestal (14) arrayed on a cascaded mounting surface (13). Partly obscured below each pedestal (14), a recess (15) is filled with an adhesive such that the corresponding mirror (11) is firmly joined on the surface (13) through the adhesive and pedestal (14). In the present embodiment, a thixotropic two-component (11 , 12) adhesive based on polyurethane resin is employed.
[0027] Figure 2 shows a beam combiner module (10) based on dichroic filters (12), sometimes referred to as dichroic mirrors, dispersed across a common baseboard (16). Seven troughs (17) consisting of a suitable aluminum alloy - as are elucidated in further detail in Figure 3 et segg. - are affixed on the baseboard (16), with each trough (17) being connected to the baseboard (16) by an M3 screw (21) and bearing a cube (18) on its front rim.
[0028] By way of example, the cube (18) depicted in the bottom left corner of Figure 2 serves as a kinematic mount for a small mirror holder (19), its three setscrews (20) accessible from the side facing the viewer. Upon precise factory setting by means of these setscrews (20) - resulting in the configuration shown -, the trough (17) may be filled with adhesive until the head of the screw (21 ) is fully embedded and the holder (19), cube (18), and filter (12) are partly immersed. Once the adhesive has fully cured, the filter (12) will be permanently fixated relative to the baseboard (16) and the screw (21) prevented from loosening.
Industrial applicability
[0029] The invention is applicable, among others, throughout the entertainment industry.
Reference signs list
[0030]
10 Module
11 Mirror
12 Filter
13 Surface
14 Pedestal
15 Recess
16 Baseboard
17 Trough
18 Cube
19 Holder
20 Setscrew 21 Screw
22 Hole
Citation list
[0031] The following documents are cited hereinbefore.
Patent literature
[0032] PTL1 : US 2012105807 A (VOLPE CHRISTOPHER MICHAEL [US]; VOLPE DAVID JAMES [US]) 03.05.2012
Non-oatent literature
[0033] NPL1 : COLDREN, Larry A, et al. Diode lasers and photonic integrated circuits. 2nd edition. Hoboken, New Jersey: John Wiley, 2012. ISBN 0470484128.
[0034] NPL2: YODER, Paul R. Mounting Optics in Optical Instruments. 2nd edition. Bellingham, Washington, USA: SPIE Press, 2008. ISBN 0819471291. p.581-628.