CN212723638U

CN212723638U - Ultra-high brightness DLP projection light path and equipment capable of loading standard interface industrial lens

Info

Publication number: CN212723638U
Application number: CN202021498436.5U
Authority: CN
Inventors: 黄国豹; 黄万周; 徐壹游; 张军
Original assignee: Shenzhen Micro Optoelectronic Technology Shenzhen Co ltd
Current assignee: Shenzhen Micro Optoelectronic Technology Shenzhen Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-03-16
Anticipated expiration: 2030-07-24

Abstract

The utility model relates to an ultra-high brightness DLP projection light path and equipment capable of loading standard interface industrial lens, which comprises a light source component, a dodging light path, a DMD chip, an imaging light path and a switching structural component; the light source component comprises a laser light source and a laser processing light path; the dodging light path is used for dodging emergent light of the light source component and emitting the dodged light to the DMD chip; the imaging light path directly images the reflected light of the effective surface of the DMD chip to an industrial lens; the effective surface of the DMD chip is imaged in the air through the imaging lens, so that the influence of prism materials and refractive indexes on the image quality of the industrial lens is avoided, and various industrial lenses can be matched with the imaging lens through the finely-classified switching structural parts, so that the existing industrial lenses can be directly purchased to replace the lenses which need high cost and long-period customization, and the development and customization cost and the compression production period are greatly reduced; the scheme of the laser light source is adopted, so that the problem of low brightness of the existing light source is solved.

Description

Ultra-high brightness DLP projection light path and equipment capable of loading standard interface industrial lens

Technical Field

The utility model relates to a DLP projection technology field, more specifically say, relate to a but super high brightness DLP projection light path and equipment of loading standard interface industrial lens.

Background

In the application occasions of the light emitting systems of the current industrial detection, scanning or 3D printing and the like, the requirements of different projection sizes and working distances are often met, basically, a projection lens needs to be replaced every time a scene is switched, and the development cost and time are greatly wasted; although various types of industrial lenses are available in the market, the industrial lenses are designed without considering the material and thickness of a prism in a DLP optical machine, so that the industrial lenses cannot be matched with the DLP optical machine.

On the other hand, for industrial application, the blue light is the most widely used light source in the market, the light source is a single LED, and the light source can only be used in the occasions with low brightness, and the application range is obviously limited.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a but super high brightness DLP projection light path and equipment of loading standard interface industrial lens.

The utility model provides a technical scheme that its technical problem adopted is:

constructing an ultra-high brightness DLP projection optical path capable of loading an industrial lens with a standard interface, wherein the DLP projection optical path comprises a light source component, a dodging optical path, a DMD chip, an imaging optical path and a switching structural component for connecting the industrial lenses with different standard interfaces; the light source component comprises a laser light source and a laser processing light path for processing emergent rays of the laser light source; the dodging light path is used for dodging emergent light of the light source component and emitting the dodged light to the DMD chip; the imaging light path directly images the reflected light of the effective surface of the DMD chip to the industrial lens in real.

Super high brightness DLP projection light path of loadable standard interface industrial lens, wherein, the formation of image light route comprises a plurality of camera lenses that distribute according to burden, positive, the symmetrical focal power of burden.

Super high brightness DLP projection light path of loadable standard interface industrial lens, wherein, laser processing light path includes expands the beam light path to the laser of laser beam compression, and right the emergent ray that the light path was expanded to the laser converges the light path that converges into the facula.

Super high brightness DLP projection light path of loadable standard interface industrial lens, wherein, laser beam expanding light path is including right the parallel light that laser source sent carries out the positive lens that converges, with positive lens converge back light and diverge into the negative lens of parallel light again.

The utility model discloses a but super high brightness DLP projection light path of loading standard interface industrial lens, wherein, laser processing light path still includes speckle elimination component; the speckle eliminating component comprises a diffusion sheet for destroying the original coherence of the laser beam and a motor for driving the laser beam to rotate.

Super high brightness DLP projection light path of loadable standard interface industrial lens, wherein, even light path is including right emergent ray of laser beam processing light path carries out the integral column of even light.

The utility model discloses a but super high brightness DLP projection light path of loading standard interface industrial lens, wherein, even light path still includes the formation of image mirror group; and after the emergent light spot of the integrating column passes through the imaging lens group, a conjugate light spot is formed at the DMD chip.

Super high brightness DLP projection light path of loadable standard interface industrial lens, wherein, imaging mirror group comprises a plurality of lens combination, and is a plurality of be provided with the speculum that is used for folding light path between the lens.

Ultra-high brightness DLP projection light path of loadable standard interface industrial lens, wherein, still include RTIR prism group, RTIR prism group is used for adjusting the emergent ray angle of even light path, and will the emergent ray reflection of DMD chip extremely on the formation of image light path.

Super high brightness DLP projection light path of loadable standard interface industrial lens, wherein, RTIR prism group is including the main prism that is isosceles right triangle and the compensating prism that is triangle-shaped.

A DLP projection device is provided with the ultra-high brightness DLP projection optical path capable of loading the standard interface industrial lens.

The beneficial effects of the utility model reside in that: the utility model discloses an effective face formation of image of DMD chip has avoided prism material and refracting index to the influence of industrial lens image quality in the air through imaging lens, and the switching structure spare of subdividing the kind is rethread for all kinds of industrial lens can match with it, just so can replace the camera lens that needs expensive long period customization at present through directly purchasing ready-made industrial lens, thereby reduce development customization cost and compression production cycle by a wide margin; furthermore, the utility model discloses an adopt laser light source's scheme to the problem that present light source luminance is low has been solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:

fig. 1 is a schematic view of an ultra-high brightness DLP projection optical path structure capable of loading a standard interface industrial lens according to a preferred embodiment of the present invention;

fig. 2 is the utility model discloses but the super high brightness DLP projection light path's of loading standard interface industrial lens laser beam expanding light path schematic diagram of preferred embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The utility model discloses but super high brightness DLP projection light path of loading standard interface industrial lens of preferred embodiment, as shown in fig. 1, refer to fig. 2 simultaneously, including light source subassembly 1, even light path 2, DMD chip 3, imaging light path 4, and connect the switching structure spare 5 of the industrial lens of different standard interfaces; the light source assembly 1 comprises a laser light source 10 and a laser processing light path for processing emergent rays of the laser light source; the dodging light path 2 is used for dodging emergent light of the light source component 1 and emitting the dodged light to the DMD chip 3; the imaging light path 4 directly images the reflected light of the effective surface of the DMD chip 3 to an industrial lens;

the utility model discloses an effective face formation of image of DMD chip has avoided prism material and refracting index to the influence of industrial lens image quality in the air through imaging lens, and the switching structure spare of subdividing the kind is rethread for all kinds of industrial lens can match with it, just so can replace the camera lens that needs expensive long period customization at present through directly purchasing ready-made industrial lens, thereby reduce development customization cost and compression production cycle by a wide margin; in addition, the utility model discloses a adopt the scheme of laser light source to the problem that present light source luminance is low has been solved;

it should be noted that the adapting structural component 5 is used as an external component, and may be a series of structural components, and has different mechanical back focus intervals and threaded apertures according to the industrial lens of a specific interface; the switching structure part can adopt the existing structural form and can also be independently designed according to industrial lenses with different standard interfaces; the adapting structural part can also adopt an independent design structure to match different mechanical back focuses and calibers, for example, a plurality of cams which are circumferentially distributed and have certain thickness are adopted to press and hold the outer side surface of the industrial lens to match and clamp the industrial lens, and the mechanical back focus is adjusted by adjusting the pressing and holding position;

the laser light source can be a single laser module or a combination of a plurality of laser modules.

Preferably, the imaging optical path 4 is composed of a plurality of lenses distributed according to negative, positive, negative, positive and negative symmetrical focal powers; the lens takes the effective surface of the DMD chip as an object and forms a real image on an imaging surface 6; because the object image is basically symmetrical, the lens adopts a symmetrical form, the focal power is constructed according to the distribution of 'minus + plus + minus', so that when light is transmitted in the lens, the light has higher light height at the positive lens and lower light height at the negative lens, and the field curvature and spherical aberration of the system are corrected through the light distribution state, so that excellent image quality is finally obtained. The first negative lens 40 located at the front and the second negative lens 44 located at the rear are advantageous for ensuring the telecentricity of the imaging system, and the negative power group 42 near the diaphragm mainly consists of cemented lenses, just responsible for the lower ray height, and is helpful for the correction of curvature of field; in the drawings, the front positive lens is denoted by reference numeral 41, and the rear positive lens is denoted by reference numeral 43;

in particular, the optical power of the above imaging optical path is not limited to the use of a single lens or cemented lens form.

The imaging plane 6 is used as a real image for simulating the effective plane of a CCD or CMOS used in an industrial lens. However, unlike a CCD or CMOS, the real image can be used as a light source at the same time.

Preferably, the laser processing light path comprises a laser beam expanding light path 11 for compressing laser beams and a converging light path 12 for converging emergent light rays of the laser beam expanding light path into light spots;

preferably, the laser beam expanding optical path 11 is composed of a positive lens 110 and a negative lens 111; parallel light emitted by the laser light source 1 enters the positive lens 110 to be converged, and then is diverged into parallel light again after passing through the negative lens 111, so that the parallel light beam realizes a compression ratio of about 3:1, and the possibility of reducing the volume of a subsequent light path is provided;

preferably, the converging light path 12 is composed of two positive lenses; the two positive lenses converge the light beams from the laser beam expanding optical path into a light spot, and the light spot enters the inlet on the left side of the integrating column.

Preferably, the laser processing optical path further comprises a speckle elimination component 13; the speckle eliminating component 13 comprises a diffusion sheet 130 for destroying the original coherence of the laser beam and a motor 131 for driving the diffusion sheet to rotate;

when the laser diffuser works, the motor 131 continuously rotates to drive the diffuser 130 to rotate, and the original coherence of laser beams can be destroyed by the high-speed rotation of the diffuser 130, so that the dazzling speckle effect is eliminated;

it should be noted that the speckle reduction assembly 13 may be disposed at the light inlet of the integrating rod or at the light outlet of the integrating rod according to the space requirement.

Preferably, the dodging light path 2 comprises an integrating column 20 for dodging the emergent light of the laser processing light path and an imaging lens group 21; after the emergent light spot of the integrating column 20 passes through the imaging lens group 21, a conjugate light spot is formed at the DMD chip 3;

the light beam is reflected for multiple times in the integrating column, a light spot with uniform brightness is finally formed at the outlet of the integrating column, and the light spot forms a rectangular light spot with uniform brightness on the DMD chip through the imaging lens group, so that the problems of single wavelength and low brightness of a light source are solved, and meanwhile, the uniformity of the light spot is high.

Preferably, the imaging lens group 21 is formed by combining a plurality of lenses, and a reflecting mirror 210 for folding the light path is arranged between the plurality of lenses; of course, according to actual needs, the reflector may not be provided, or a plurality of reflectors may be provided; the transformation belongs to the protection scope of the transformation.

Preferably, the optical lens further comprises an RTIR prism group 7, wherein the RTIR prism group 7 is used for adjusting the angle of the emergent light of the dodging optical path and reflecting the emergent light of the DMD chip 3 to the imaging optical path 4; the RTIR prism group includes a main prism 70 in the shape of an isosceles right triangle and a compensation prism 71 in the shape of a triangle;

the primary prism 70 mainly utilizes the transmission and total internal reflection of the prism surface to spatially separate the light source assembly 1 and the imaging light path 4, thereby improving the utilization efficiency of light energy.

The compensation prism 71 has the function of compensating the symmetry of the optical path, so that the light spot at the DMD chip 3 has good uniformity.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. An ultra-high brightness DLP projection optical path capable of loading industrial lenses with standard interfaces is characterized by comprising a light source component, a light homogenizing optical path, a DMD chip, an imaging optical path and a switching structural component for connecting the industrial lenses with different standard interfaces; the light source component comprises a laser light source and a laser processing light path for processing emergent rays of the laser light source; the dodging light path is used for dodging emergent light of the light source component and emitting the dodged light to the DMD chip; the imaging light path directly images the reflected light of the effective surface of the DMD chip to the industrial lens in real.

2. The ultra-high brightness DLP projection optical path capable of loading the standard interface industrial lens as claimed in claim 1, wherein the imaging optical path is composed of a plurality of lenses with symmetrical power distribution of negative, positive, negative, positive and negative.

3. The ultra-high brightness DLP projection optical path capable of loading the standard interface industrial lens according to claim 1, wherein the laser processing optical path comprises a laser beam expanding optical path for compressing a laser beam and a converging optical path for converging emergent light rays of the laser beam expanding optical path into a light spot.

4. The ultra-high brightness DLP projection optical path capable of being loaded with the standard interface industrial lens according to claim 3, wherein the laser beam expanding optical path comprises a positive lens for converging the parallel light emitted by the laser light source, and a negative lens for diverging the light into the parallel light again after the light is converged by the positive lens.

5. The ultra-high brightness (DLP) projection optical path of the loadable standard interface industrial lens according to claim 3, wherein the laser processing optical path further comprises a speckle elimination component; the speckle eliminating component comprises a diffusion sheet for destroying the original coherence of the laser beam and a motor for driving the laser beam to rotate.

6. The ultra-high brightness DLP projection optical path capable of loading the standard interface industrial lens according to any one of the claims 1 to 5, wherein the dodging optical path comprises an integrating column and an imaging lens group for dodging the emergent light of the laser processing optical path; and after the emergent light spot of the integrating column passes through the imaging lens group, a conjugate light spot is formed at the DMD chip.

7. The ultra-high brightness DLP projection optical path capable of loading the standard interface industrial lens according to claim 6, wherein the imaging lens group is composed of a plurality of lens combinations, and a reflecting mirror for folding the optical path is arranged between a plurality of the lenses.

8. The ultra-high brightness DLP projection optical path capable of loading the standard interface industrial lens according to any one of claims 1 to 5, further comprising an RTIR prism group, wherein the RTIR prism group is used for adjusting the emergent ray angle of the dodging optical path and reflecting the emergent ray of the DMD chip to the imaging optical path.

9. The ultra-high brightness DLP projection optical path capable of loading the standard interface industrial lens as claimed in claim 8, wherein the RTIR prism set comprises a main prism in an isosceles right triangle shape and a compensation prism in a triangle shape.

10. A DLP projection apparatus, wherein the standard-interface industrial lens loadable ultrahigh-brightness DLP projection optical path according to any one of claims 1 to 9 is provided with the standard-interface industrial lens loadable ultrahigh-brightness DLP projection optical path.