CN112835257A

CN112835257A - Optical machine illumination system and laser projection equipment

Info

Publication number: CN112835257A
Application number: CN202110073672.5A
Authority: CN
Inventors: 黄永达; 杨帆
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-05-25

Abstract

The application discloses ray apparatus lighting system belongs to the laser projection field. The opto-mechanical lighting system comprises: an illumination lens group and a light valve; the illuminating lens group comprises a dodging component, a collimating lens group, a rectangular reflector and a total internal reflection prism, wherein the collimating lens group comprises at least three lenses, and the at least three lenses are spherical lenses; wherein, two adjacent sides of the rectangular reflector form included angles with the display surface of the light valve. The application provides an optical machine lighting system places the rotation of rectangle speculum to avoid other structures among the optical machine lighting system, avoided cutting the rectangle speculum, and lens all use the spherical lens of easy processing, solved among the correlation technique optical machine lighting system manufacturing process comparatively loaded down with trivial details problem, realized simplifying the effect of optical machine lighting system manufacturing process, reduced optical machine lighting system's manufacturing cost simultaneously.

Description

Optical machine illumination system and laser projection equipment

Technical Field

The application relates to the field of laser projection, in particular to an optical machine illumination system and laser projection equipment.

Background

At present, the laser projection technology is a novel projection technology in the market, and the laser projection technology has the characteristics of high picture contrast, clear imaging, bright color and high brightness, and the characteristics enable the laser projection technology to become the mainstream development direction in the market.

The utility model provides an optical machine lighting system for laser display projection equipment provides required light source for laser projection equipment, and this optical machine lighting system need be with reflector wherein with light deflection when using, in the actual installation, because optical machine lighting system's device space is less, for dodging other structures in the optical machine lighting system, need cut the reflection lens.

However, in the optical engine lighting system, the reflective lens is cut, so that the manufacturing process of the optical engine lighting system is complicated.

Disclosure of Invention

The embodiment of the application provides an optical machine illumination system, which can solve the problem of higher cost in the related technology. The technical scheme is as follows:

according to an aspect of the application, there is provided an opto-mechanical lighting system, comprising: an illumination lens group and a light valve;

the illumination lens group comprises a dodging component, a collimating lens group, a rectangular reflector and a total internal reflection prism, wherein the collimating lens group comprises at least three lenses, and the at least three lenses are spherical lenses;

two adjacent edges of the rectangular reflector form included angles with the display surface of the light valve.

Optionally, the collimating lens group includes a first lens and a second lens located at the light incident side of the rectangular reflector, and a third lens located at the light emergent side of the rectangular reflector.

Optionally, the third lens is located outside the light incident surface of the tir prism, the third lens deflects a target angle from a first position to a direction away from the light valve along a first axis, the first axis passes through an optical center of the third lens and an axis perpendicular to a first plane, the first position is a position where a main optical axis of the third lens is perpendicular to the light incident surface, and the first plane is a plane determined by the main optical axis of the third lens and a light emergent direction of the light valve.

Optionally, the target angle is greater than 0 degrees and less than or equal to 8 degrees.

Optionally, a main optical axis of the first lens is parallel to an optical axis of the illuminating lens group;

and the main optical axis of the second lens is parallel to the optical axis of the illuminating mirror group.

Optionally, the optical-mechanical illumination system includes a housing, and the illumination mirror group, the light valve and the projection lens are all mounted in the housing;

the reflector bracket is arranged on the shell and comprises at least two fixed terminals arranged on the inner wall of the shell, the at least two fixed terminals comprise first fixed terminals and second fixed terminals, the length of each first fixed terminal is larger than that of each second fixed terminal, and each first fixed terminal and each second fixed terminal are fixedly connected with one edge of the reflector.

Optionally, the tir prism comprises two prisms and a compensating prism between the two prisms.

Optionally, the distance from the dodging component to the rectangular reflector is 35-40 mm.

Optionally, the materials of the lenses in the collimating lens group are the same.

Optionally, a laser projection device includes the optical machine illumination system.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

the embodiment of the application provides an ray apparatus lighting system including lighting mirror group and light valve, the lens that wherein lighting mirror group in is the spherical lens of easier processing, two adjacent limits of rectangular mirror all with there is the contained angle in the display surface of light valve for avoid other structures in the ray apparatus lighting system, avoided cutting the rectangular mirror, solved among the correlation technique ray apparatus lighting system manufacturing process comparatively loaded down with trivial details problem. The effect of simplifying the manufacturing process of the optical machine illumination system is achieved, and meanwhile the manufacturing cost of the optical machine illumination system is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of an illumination lens assembly of an optical-mechanical illumination system;

FIG. 2 is a schematic diagram of a reflector in the illumination system of FIG. 1;

FIG. 3 is a left side view of the reflector and the light valve in the illumination system of FIG. 1;

fig. 4 is a schematic structural diagram of an optical-mechanical illumination system according to an embodiment of the present disclosure;

FIG. 5 is a right view of the rectangular mirror and the light valve in the optical-mechanical illumination system shown in FIG. 4;

FIG. 6 is a schematic view of an illumination lens assembly of the optical-mechanical illumination system shown in FIG. 4;

FIG. 7 is a schematic diagram of a portion of the light engine illumination system shown in FIG. 4;

fig. 8 is a schematic structural diagram of a laser projection apparatus according to an embodiment of the present application.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, fig. 1 is a schematic view of an illumination lens assembly structure of an optical-mechanical illumination system, which includes an illumination lens assembly 11, a light valve and other structures (the other structures may include various structures such as a housing), wherein the illumination lens assembly includes a light uniformizing element 111, a lens assembly 112, a reflector 113 and a tir prism 114. The lens assembly 112 includes a first lens 1121, a second lens 1122, and a third lens 1123, the three lenses in the lens assembly 112 are made of different materials and include an aspheric lens, the aspheric lens has a better curvature radius and can maintain a good aberration correction, and the aspheric lens can adjust the optical path to a greater extent than the spherical lens to achieve the final spot correction, but the aspheric lens has a more complex manufacturing process and a greater manufacturing difficulty.

The laser refers to a photon beam (laser) in which electrons in atoms absorb energy, then transit from a low energy level to a high energy level, and then fall back from the high energy level to the low energy level, the released energy is emitted in the form of photons, and is induced (excited), and the photon optical characteristics are highly uniform. Therefore, compared with a common light source, the laser beam has the characteristics of monochromaticity, good directivity and higher brightness.

Laser speckle refers to the interference of light beams to form bright or dark spots, creating random grainy intensity patterns, when a laser light source is used to illuminate a rough surface such as a screen or any other object that produces diffuse reflection or diffuse transmission.

As shown in fig. 1, the mirror 112 deflects the light beam passing through the first lens 1121 and the second lens 1122 by 45 °, and reflects the deflected light beam toward the third lens 1123.

As shown in fig. 2, fig. 2 is a schematic structural diagram of the reflector 113 in the optical-mechanical illumination system shown in fig. 1, in actual installation, because the device space of the optical-mechanical illumination system is small, in order to avoid other structures in the optical-mechanical illumination system, the edge a and the edge b of the reflector 113 are cut once respectively, and the cutting manner increases the steps of the manufacturing process of the reflector.

As shown in fig. 3, fig. 3 is a schematic left-view structural diagram of the reflector 113 and the light valve 12 in the illumination system of the optical machine shown in fig. 1; two adjacent sides of the reflector 113, one side a being parallel to the display surface of the light valve 12 (the display surface being perpendicular to the paper surface in fig. 3) and the other side b being perpendicular to the display surface of the light valve 12, are cut once for each of the sides a and b of the reflector 113 in order to avoid other structures 13 in the opto-mechanical illumination system.

The lenses and reflectors used in the above-mentioned illumination lens group lead to a cumbersome manufacturing process of the optical-mechanical illumination system.

The embodiment of the application provides an optical machine lighting system, which can solve the problems existing in the related art.

As shown in fig. 4, fig. 4 is a schematic structural diagram of an optical engine illumination system provided in the embodiment of the present application, where an incident direction of a light path is f1, the optical engine illumination system may include: an illumination lens group 21 and a light valve 22; the light valve may include a Digital Micromirror Device (DMD), or may include a liquid crystal light valve, which may be a Digital Micromirror Device (DMD) and may include an array of high-speed digital light reflection elements. Illustratively, the light valve may include a plurality of small mirrors, one small mirror for each pixel, with the number of small mirrors determining the display resolution of the light valve.

The light valve may have a resolution of 2K, or may have a resolution of 3K or higher, which is not limited in this application.

The illumination lens group 21 includes a dodging assembly 211, a collimating lens group 212, a rectangular reflector 213 and a total internal reflection prism 214, the collimating lens group 212 includes at least three lenses, and at least three lenses are spherical lenses; the light homogenizing assembly 211 is used for homogenizing the light entering the illumination system, the homogenized light beam is adjusted by the collimating lens assembly 2122 and the rectangular reflector, and then is emitted to the light valve 22 through the tir prism 214, the light valve 22 is used as a light modulation element, receives the adjusted light beam, reflects an image light beam, and the image light beam is emitted out of the illumination lens assembly through the tir prism 214.

Wherein, at least three lens are spherical lens, compare in using the higher aspheric lens of manufacturing the degree of difficulty, spherical lens makes difficult lower to ray apparatus lighting system's cost has been reduced.

As shown in fig. 5, fig. 5 is a schematic diagram of a right view structure of the rectangular mirror 213 and the light valve 22 in the optical-mechanical illumination system shown in fig. 4; the optical-mechanical illumination system further includes another structure 23, two adjacent sides c and d of the rectangular reflector 213 form an included angle with the display surface of the light valve 22, that is, the rectangular reflector 213 is rotatably disposed on the plane where the rectangular reflector 213 is located so as to avoid the other structure 23 in the optical-mechanical illumination system, and the rectangular reflector 213 does not need to be cut, thereby simplifying the processing process of the rectangular reflector 213. At this time, the rectangular mirror 213 may deflect the propagation direction of the light beam to meet the requirement of the light valve 22 for incident light, and may also adjust the relative position relationship of each part in the illumination lens set to optimize the volume of the optical-mechanical illumination system.

Exemplarily, a rectangular reflector in an optical-mechanical illumination system needs to deflect light by 45 degrees, and for reducing cost, the rectangular reflector is not cut any more, and other structures in the optical-mechanical system are avoided by placing the rectangular reflector in a rotating manner, so that the same light deflection effect can be achieved.

To sum up, this application embodiment provides an ray apparatus lighting system including lighting mirror group and light valve, and the lens of the group of wherein lighting mirror is spherical lens of easier processing, two adjacent limits of rectangular mirror all with there is the contained angle in the display surface of light valve for avoid other structures in the ray apparatus lighting system, avoided cutting the rectangular mirror, solved the comparatively loaded down with trivial details problem of ray apparatus lighting system manufacturing process among the correlation technique. The effect of simplifying the manufacturing process of the optical machine illumination system is achieved, and meanwhile the manufacturing cost of the optical machine illumination system is reduced.

Optionally, the third lens is located outside the light incident surface of the tir prism, the third lens deflects the target angle from a first position to a direction away from the light valve along a first axis, the first axis passes through an optical center of the third lens and is an axis perpendicular to a first plane, the first position is a position where a main optical axis of the third lens is perpendicular to the light incident surface, and the first plane is a plane determined by the main optical axis of the third lens and a light emergent direction of the light valve.

Optionally, a main optical axis of the first lens is parallel to an optical axis of the illumination mirror group;

the main optical axis of the second lens is parallel to the optical axis of the lighting lens group.

Optionally, the optical-mechanical illumination system includes a housing, and the illumination mirror group, the light valve and the projection lens are all mounted on the housing.

The reflector bracket is arranged on the shell and comprises at least two fixed terminals arranged on the inner wall of the shell, the at least two fixed terminals comprise a first fixed terminal and a second fixed terminal, the length of the first fixed terminal is larger than that of the second fixed terminal, and the first fixed terminal and the second fixed terminal are fixedly connected with one edge of the reflector.

Optionally, the tir prism comprises two prisms and a compensating prism located between the two prisms.

Optionally, the material of the lenses in the collimating lens group is the same.

Optionally, a laser projection device comprises an optical engine illumination system.

As shown in fig. 6, fig. 6 is a schematic structural diagram of the illumination lens group 21 in the optical-mechanical illumination system shown in fig. 4, and the incident direction of the light path is f1, wherein the collimating lens group 212 is configured to receive the homogenized light beam emitted from the dodging component 211 and direct the adjusted light beam to the rectangular mirror 213, and the collimating lens group 212 receives the light beam reflected from the rectangular mirror 213 and directs the light beam to the tir prism 214.

Alternatively, the collimating lens group 212 includes a first lens 2121 and a second lens 2122 on the light-in side of the rectangular reflector 213, and a third lens 2123 on the light-out side of the rectangular reflector, which are all spherical lenses and are easier to process than aspheric lenses. The spherical lens is a lens with a curved surface and a circular-arc cross-section curve, i.e. an optical element composed of two coaxial refractive curved surfaces, and can be usually made of optical glass by grinding. Both refractive surfaces of most lenses are spherical, and one refractive surface of a partial lens may be a flat surface. The lenses may be classified into a convex lens having a central portion thicker than an edge portion and a concave lens having a central portion thinner than an edge portion. The convex lens can converge the light rays and can be called as a converging lens; a concave lens may act to diverge light rays and may be referred to as a "diverging lens". A single convex lens can form a real image or a virtual image, but a single concave lens can only form a virtual image, and the lens used in the collimating lens group 212 in the embodiment of the present application may be a convex lens.

The light homogenizing assembly 211 is configured to homogenize the light beam emitted by the light source, and emit the homogenized light beam to the first lens 2121, where the light beam is refracted and converged by the first lens 2121 and the second lens 2122, reflected by the rectangular mirror 213, and then converged by the third lens 2123.

The light homogenizing assembly 211 may include a light guide tube, which is a tubular device formed by splicing four plane reflection sheets, i.e. a hollow light guide tube, and the light is reflected multiple times inside the light guide tube to achieve the light homogenizing effect.

In addition, the dodging assembly 211 may also include a fly-eye lens, which is generally formed by combining a series of small lenses, two rows of fly-eye lens arrays are arranged in parallel to divide the light spot of the input laser beam, and the divided light spots are accumulated by a subsequent focusing lens, so as to achieve the light beam homogenization and light spot optimization. In an optical-mechanical illumination system, the light homogenizing assembly 211 may be at least one of a light pipe or a fly-eye lens, and the embodiments of the present application are not limited thereto.

Alternatively, as shown in fig. 7, fig. 7 is a partial structural schematic diagram of the optical-mechanical illumination system shown in fig. 4, the third lens 2123 is located outside the light-incident surface s of the tir prism, the third lens 2123 is deflected by a target angle α along a first axis from a first position p to a direction away from the light valve 22, the first axis is an axis passing through the optical center e of the third lens 2123 and perpendicular to a first plane, the first position p is a position where the main optical axis of the third lens 2123 is perpendicular to the light-incident surface s, and the first plane is a plane defined by the main optical axis of the third lens 2123 and the light-emitting direction f2 of the light valve 22. The third lens 2123 is located at the second position k after deflecting the target angle α from the first position p to a direction away from the light valve 22 along the first axis, and is used for correcting the light spot, the main optical axis is a connecting line of curvature centers of the front and rear surfaces of the lens, and the curvature center is a center of an arc of a curved surface of the lens.

For example, since all three lenses of the collimating lens group in the embodiment of the present application are spherical lenses, a phenomenon that RMS (Root Mean Square) light spots in a whole picture are not uniform occurs in a light beam adjusted by the collimating lens group, the RMS light spots reflect the average size of the light spots, the RMS light spots on one side of the picture are much larger than those on the other side, in order to make the RMS light spots of the whole picture uniform and smaller, the third spherical lens is tilted, according to the picture light spot expression state, the third lens deflects a target angle from a first position to a direction away from the light valve along a first axis, so that the light beam can be further converged, the light spot distribution can be adjusted, optical paths of various fields can be balanced, and finally the RMS value of the picture light spots can reach a required range, and the projection quality of the optical-mechanical illumination system is not affected in the required range.

Optionally, the target angle is greater than 0 degrees and less than or equal to 8 degrees. When the target angle is greater than 0 degrees and less than or equal to 8 degrees, the third lens can play a role in correcting the light spot. For example, as shown in fig. 5, when the third lens is deflected by an angle α of 5 degrees along the first axis from the first position to a direction away from the light valve, the RMS value of the image flare can reach a desired range, and the quality of the projected image can be improved.

Alternatively, as shown in fig. 6, the primary optical axis of the first lens element 2121 is parallel to the optical axis of the illumination lens group 21, and functions to converge the light beam emitted from the dodging assembly 211, so as to reduce the spot size.

The main optical axis of the second lens element 2122 is parallel to the optical axis of the illumination lens assembly 212, and functions to further converge the light beam emitted after adjustment by the first lens element 2121, and further reduce the size of the light spot.

Optionally, as shown in fig. 4, the optical-mechanical illumination system includes a housing 24, and the illumination mirror group 21 and the light valve 22 are installed in the housing 24.

The reflector bracket comprises at least two fixed terminals arranged on the inner wall of the shell, the at least two fixed terminals comprise a first fixed terminal and a second fixed terminal, the length of the first fixed terminal is greater than that of the second fixed terminal, and the first fixed terminal and the second fixed terminal are fixedly connected with one edge of the reflector; the reflector bracket is used for placing and fixing the rectangular reflector, the length of the first fixing terminal is larger than that of the second fixing terminal, so that the rectangular reflector installed on the fixing terminal can avoid other structures in the shell under the condition that the rectangular reflector is not cut, and the effects of deflecting the propagation direction of light beams and adjusting the relative position relation of all parts in the shell are achieved.

Optionally, the tir prism comprises two prisms and a compensating prism located between the two prisms, the tir prism is used for changing the light path in the digital projection system, and can separate the illumination beam and the imaging beam in the light path, and one compensating prism is glued between the two prisms in the tir prism with a certain air gap to compensate the light path; the TIR prism may be a TIR (Total internal reflection, TIR) prism, which is an optical phenomenon that when a light ray passes through two media with different refractive indexes, part of the light ray is refracted at an interface of the media, and the rest is reflected, but when the incident angle is larger than the critical angle (the light ray is far away from the normal), the light ray stops entering another interface, and is totally reflected to the inner surface. TIR prisms are used to alter the ray path in a projection system.

Optionally, the distance from the light homogenizing assembly to the rectangular reflector is 35-40 mm, in this embodiment of the application, since the refractive index of the first lens is higher, in order to reduce the RMS light spot, the distance from the light guide to the first lens may be reduced, and accordingly, the distance between the first lens and the second lens and the distance between the second lens and the rectangular reflector may be reduced simultaneously.

The packaging modes of the existing PICO and ECD two types of DMD chips are different, so that the overall thicknesses of the PICO and ECD two types of DMD chips are different, and the thickness of the ECD DMD chip is larger. The package refers to a case for mounting a chip. The chip can play the roles of mounting, fixing, sealing, protecting the chip and enhancing the electrothermal performance, and can be connected to pins of the packaging shell by leads through the contacts on the chip, and the pins are connected with other devices by leads on the circuit board, thereby realizing the connection of the internal chip and an external circuit. On one hand, the chip can be isolated from the outside, and the electric performance reduction caused by the corrosion of the impurities in the air to the chip circuit is prevented; on the other hand, the packaged chip is more convenient to mount and transport. Therefore, different products are divided in the 0.47-inch DMD product according to the PICO type and the ECD type, the total internal reflection prisms with different thicknesses are respectively used, namely, the thicker total internal reflection prism is used for matching with the PICO type DMD, and the thinner total internal reflection prism is used for matching with the ECD type DMD, so that the total internal reflection prism is not universal, and the manufacturing difficulty of the total internal reflection prism is increased.

Because the DMD of PICO and ECD two types encapsulates the thickness difference, the DMD thickness of ECD is great, chooses for use thinner total internal reflection prism can match the DMD of PICO and ECD two types. The distance between the light homogenizing assembly and the rectangular reflector is 35-40 mm, and the problem that the RMS light spot is large due to the fact that the total internal reflection prism is thin can be solved.

For example, as shown in fig. 6, when the distance h1 between the light homogenizing assembly 211 and the first lens 2121 is 4.3mm, the distance h2 between the first lens 2121 and the second lens 2122 is 7.268mm, the distance h between the second lens 2122 and the rectangular reflecting mirror 213 is 312.429mm, and the thickness of the first lens and the thickness of the second lens are both 7mm, that is, the distance between the light homogenizing assembly 211 and the rectangular reflecting mirror 213 is 37.997mm, at this time, the RMS light spot of the picture can reach the required range of the projected picture, and finally, the RMS value of the picture light spot reaches the required range, and in this required range, the projection quality of the optical engine lighting system is not affected.

Alternatively, as shown in fig. 6, the lenses in the collimating lens group 212 are made of the same material, that is, the first lens 2121, the second lens 2122 and the third lens 2122 are made of the same material, and the use of the same material facilitates the processing and manufacturing of the lenses, thereby reducing the difficulty and cost of processing the lenses.

Illustratively, to replace the aspheric lens with the spherical lens, the light rays need to be refracted to a greater degree, so the first lens, the second lens and the third lens can be made of materials with higher refractive index and easier processing, and the first lens, the second lens and the third lens can be made of H-ZLAF55D (H-ZLAF55D is an optical glass brand).

As shown in fig. 8, fig. 8 is a schematic structural diagram of a laser projection apparatus provided in an embodiment of the present application. The laser projection apparatus may include a light source 30, an optical-mechanical illumination system 20, a mirror deflection assembly 40, and a projection lens 50. The light source 30 is a laser light source, emits a light beam to the illumination assembly 201, the light beam enters the light valve 202 after being adjusted by the illumination assembly 201, the light valve 202 modulates the light beam and emits an image light beam, and the image light beam passes through the image shift mirror group 40, enters the projection lens 50, and is emitted out of the laser projection apparatus by the projection lens 50.

Optionally, the optical-mechanical illumination system 20 in the laser projection apparatus may refer to the optical-mechanical illumination system provided in the above embodiment, and includes the illumination assembly 201 and the light valve 202, three lenses in the illumination assembly 201 are all aspheric lenses and are made of the same material, and the rectangular mirror is placed obliquely to avoid other structures in the projection apparatus, and the rectangular mirror does not need to be cut.

The mirror image shifting lens assembly 40 (which may include a galvanometer) may include an optical lens and a driving component, wherein the driving component may drive the optical lens to continuously swing around a predetermined rotation axis, and the optical lens may change the direction of the light beam accordingly. The image shift mirror group 40 is disposed between the light valve 202 and the projection lens 50, and shifts the image by high-frequency vibration, so that the laser projection apparatus realizes high-resolution display, the projection lens 50 is used for imaging, and the light beam emitted by the light source 30 is emitted to the illumination assembly 201.

For example, when the light beams incident on the image shift mirror group are parallel light beams (i.e. the incident angles of each light beam in the light beams are the same), after the optical lenses in the image shift mirror group swing from one position to another position, the shift distances of each pixel of the projection image corresponding to the image light beams are all equal, so that the offsets of each field of view in the projection lens to the projection screen are the same, and thus, the high-resolution display of the visual image can be ensured. Wherein the offset of the field of view refers to the actual displacement distance of the field of view. The embodiment of the application places the mapping offset mirror group between the light valve and the projection lens in the optical-mechanical illumination system, and can convert 2k or 3k resolution into 4k resolution through rotation of the mapping offset mirror group, thereby reducing the difficulty of system design.

After the image shift lens set is applied, the light valve with 2K resolution can also achieve 4K resolution by matching with the image shift lens set. The light valve with 3k resolution can also achieve 4k resolution by matching with the image shift mirror group, and light beams incident on the light valve can be reflected into the projection lens by controlling the light valve to generate imaging light beams, and images projected on a screen by the imaging light beams are image pictures.

When the light beam incident on the image shift lens group swings from one position to another position through the flat glass in the image shift lens group, a frame of picture is projected for multiple times and superposed by using the phenomenon of persistence of vision. The laser projection equipment can be matched with two types of DMD chips of a PICO (peripherally inserted Central optical System) and an ECD (electronic digital display), and can project pictures of 72-120 inches, and the projected pictures can realize the projection imaging quality of 4K resolution based on the matching of the mapping offset mirror group.

The light source in the embodiment of the present application may include a light conversion unit, which receives laser light from the laser light source and converts the laser light into visible light of various colors to provide for the light uniformizing assembly. The embodiments of the present application exemplarily use a monochromatic laser light source, but are not limited to the monochromatic laser light source.

The project equipment at present is the Digital Light Processing (DLP for short, the technology is to process the image signal digitally and then project the Light) and the Liquid Crystal Display (LCD for short, Liquid Crystal Display) for the Liquid Crystal Display, wherein the LCD uses the electro-optical effect of the Liquid Crystal and controls the transmittance and reflectance of the Liquid Crystal unit through the circuit, so as to generate the image with different gray levels and colors, the main imaging device of the LCD is the Liquid Crystal panel, and the Light on the red, green and blue Liquid Crystal panels is transmitted through the lens amplification and the reflector; in the DLP working mode, light rays are subjected to color mixing after being rotated at a high speed by the color wheel and finally transmitted out through the prism. However, in both of these methods, a bulb is used, which has a long life and has relatively low picture brightness and color purity.

Compared with the LCD and DLP projection equipment, the laser projection equipment in the embodiment of the application has longer service life, and screen brightness can not become dark due to long-time work; the color gamut is wide, and can reach 2 times of the color gamut of LCD and DLP projection equipment.

To sum up, this application embodiment provides a laser projection equipment including lighting components, light valve, projecting lens, mapping skew mirror group and light source, the lens among the lighting components wherein be easier spherical lens of processing, two adjacent limits of rectangular mirror all with there is the contained angle in the display surface of light valve for avoid other structures among the ray apparatus lighting system, avoided cutting the rectangular mirror, solved among the correlation technique ray apparatus lighting system manufacture process comparatively loaded down with trivial details problem. The effect of simplifying the manufacturing process of the optical machine illumination system is achieved, and meanwhile the manufacturing cost of the optical machine illumination system is reduced.

In addition, the materials of the lenses in the lighting lens group are the same, so that the manufacturing difficulty of the optical-mechanical lighting system is further reduced, and the cost is reduced.

The term "at least one of a and B" in the present application is only one kind of association relationship describing an associated object, and means that three kinds of relationships may exist, for example, at least one of a and B may mean: a exists alone, A and B exist simultaneously, and B exists alone. Similarly, "A, B and at least one of C" indicates that there may be seven relationships that may indicate: seven cases of A alone, B alone, C alone, A and B together, A and C together, C and B together, and A, B and C together exist. Similarly, "A, B, C and at least one of D" indicates that there may be fifteen relationships, which may indicate: fifteen cases of a alone, B alone, C alone, D alone, a and B together, a and C together, a and D together, C and B together, D and B together, C and D together, A, B and C together, A, B and D together, A, C and D together, B, C and D together, A, B, C and D together exist.

In this application, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the location of the described components is merely a logical functional location, and other arrangements of locations are possible in actual implementation.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An opto-mechanical lighting system, comprising: an illumination lens group and a light valve;

2. The opto-mechanical illumination system of claim 1, wherein the collimating lens group comprises a first lens and a second lens on the light-in side of the rectangular reflector, and a third lens on the light-out side of the rectangular reflector.

3. The opto-mechanical illumination system of claim 2, wherein the third lens is located outside the light-incident surface of the tir prism, the third lens is deflected by a target angle along a first axis from a first position to a direction away from the light valve, the first axis is an axis passing through an optical center of the third lens and perpendicular to a first plane, the first position is a position where a main optical axis of the third lens is perpendicular to the light-incident surface, and the first plane is a plane defined by the main optical axis of the third lens and a light-emitting direction of the light valve.

4. The opto-mechanical illumination system of claim 3, wherein the target angle is greater than 0 degrees and less than or equal to 8 degrees.

5. The opto-mechanical illumination system of claim 2, wherein a primary optical axis of the first lens is parallel to an optical axis of the set of illumination mirrors;

6. The opto-mechanical illumination system of claim 1, comprising a housing, the set of illumination mirrors, the light valve, and the projection lens being mounted in the housing;

7. The opto-mechanical illumination system of claim 1, wherein the total internal reflection prism comprises two prisms and a compensation prism between the two prisms.

8. The opto-mechanical illumination system of claim 1, wherein the distance from the light homogenizing assembly to the rectangular reflector is 35-40 mm.

9. The opto-mechanical illumination system of claim 1, wherein the lenses in the collimating lens group are of the same material.

10. A laser projection device comprising the opto-mechanical illumination system of any of claims 1-9.