CN201464798U

CN201464798U - Three-dimensional projectors

Info

Publication number: CN201464798U
Application number: CN2009200754840U
Authority: CN
Inventors: 寇懿; 王薇; 刘亮; 周军明
Original assignee: SHANGHAI VALUE-ADDED DIGITAL TECHNOLOGY Co Ltd
Current assignee: SHANGHAI VALUE-ADDED DIGITAL TECHNOLOGY Co Ltd
Priority date: 2009-07-29
Filing date: 2009-07-29
Publication date: 2010-05-12
Anticipated expiration: 2019-07-29

Abstract

The utility model relates to three-dimensional projectors which comprise a left projector corresponding to left eye and a right projector corresponding to right eye; and each of the left and the right projectors comprises a light source, a projecting lens, a prism as well as an R light filtering channel, a G light filtering channel and a B light filtering channel which are arranged side by side. Two sets of complementary wave bands, namely R1, G1 and B1 as well as R2, G2 and B2, are generated by cutting the wave bands of R, G and B light filtering channels. The three-dimensional projectors greatly reduce the difficulty of manufacturing light filters, improves the brightness of three-dimensional projecting pictures, reduces color distortion of three-dimensional projecting pictures, and effectively avoids the phenomena of double imaging and ghosting in the prior art.

Description

A kind of 3 D stereo projector

Technical field

The utility model relates to projection arrangement, particularly relates to a kind of 3 D stereo projector.

Background technology

At present, the main flow stereo projection technology of putting into commercial operation can be divided three classes: active three-dimensional display system, passive polarization three-dimensional display system and spectral separation three-dimensional display system.

Initiatively three-dimensional is that projector about 120Hz alternately exports the right and left eyes picture with a refresh rate, the separation that the LCD anaglyph spectacles that cooperation can left and right sides alternation switch switches the realization left-and right-eye images synchronously, and stereoeffect is fine.But initiatively the anaglyph spectacles cost is higher, and the frequent switch flicker meeting of anaglyph spectacles brings discomfort to eyes, and light is also very big by luminance loss behind the crystal glasses sheet.

Passive polarization stereoprojection is based on the polarization state of light principle, with direction of vibration mutually the two bundle polarized lights of vertical (or the circularly polarized light direction is opposite) two width of cloth image projection to screen, watch with two vertical polarized lenses of printing opacity direction again, two eyes will be seen different images, thereby obtain stereoscopic picture plane.Polarization stereoprojection is very high except the polarizability requirement to screen, also has serious light loss problem in projection process, requires the gain of screen higher.In addition, the metal curtain of polarization stereoprojection employing exists serious solar effect and metal glare problem.

Many bandpass filters that spectral separation stereo display utilization is installed in behind the light source or camera lens is preceding carry out spectrum to be cut apart, and left-and right-eye images is separated, and forms stereoprojection.This technology can be used common screen, cooperates special eyeglasses, and cost is not high.But the light loss of present spectral unmixing technology is bigger, and color is cut apart balance and accuracy requirement is higher, otherwise can cause three-dimensional discrimination inconsistent.On the other hand, the cost of manufacture of the good many bandpass filters of optical property is also very high.

Summary of the invention

Technical problem to be solved in the utility model is exactly to provide a kind of 3 D stereo projector for the defective that overcomes above-mentioned prior art existence.

The purpose of this utility model can be achieved through the following technical solutions: a kind of 3 D stereo projector, it is characterized in that, comprise one group of corresponding left eye respectively, the left projector of right eye and right projector, described left projector and right projector include light source, projection lens, prism, R optical filtering passage side by side, G optical filtering passage and B optical filtering passage, described R optical filtering passage comprises first dichronic mirror of transmit red light reflect green light and blue light, the first single bandpass filter and first catoptron, described light source, first dichronic mirror, the first single bandpass filter and first catoptron are arranged in order, described G optical filtering passage comprises second dichronic mirror of transmit blue reflect green light, second single bandpass filter, described second dichronic mirror, second single bandpass filter, prism and projection lens are arranged in order, described B optical filtering passage comprises second catoptron that is arranged in order, the 3rd single bandpass filter and the 3rd catoptron, the front side of described prism and both sides are equipped with a slice LCD, and the light beam that three optical filtering passages produce is respectively from the LCD incident of three faces of prism.

Described light source is argon arc lamp or extra-high-pressure mercury vapour lamp.

The logical wave band of the band of first single bandpass filter, second single bandpass filter and the 3rd single bandpass filter of logical wave band of the band of first single bandpass filter of described left projector, second single bandpass filter and the 3rd single bandpass filter and right projector is a complementary relationship.

The utility model is that a kind of color of innovation is cut apart the 3 D stereo projection arrangement, it is different from existing color and cuts apart the 3 D stereo projection arrangement, the method that employing is cut apart respectively R, G, each band of channles of B, the wave band of generation R1, G1, B1 and R2, G2, two groups of complementations of B2; Compared with prior art, the utlity model has following advantage:

A. because every group of two projectors adopt three single bandpass filters respectively, rather than many bandpass filters of a slice have in the past reduced the manufacture difficulty of optical filter greatly, have reduced cost;

B. owing to adopt single bandpass filter, the rectangle degree of the logical waveform of band is increased, increased the brightness of stereoprojection picture;

C. owing to adopt single bandpass filter, consistance, the accuracy of the logical wave band of each optical filter band are increased, reduced the color error ratio of stereoprojection picture;

D. owing to adopt single bandpass filter, the logical wave band accuracy of each band is increased, the overlapping wave band of left and right two pictures reduces in one group, has effectively avoided phenomenons such as ghost image of the prior art, ghost.

Description of drawings

Fig. 1 is a schematic diagram of the present utility model;

Fig. 2 is the structural representation of projector of the present utility model.

Fig. 3 is the logical comparison diagram of the output band of left projector of the present utility model and right projector.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As Fig. 1, shown in 2, a kind of 3 D stereo projector, comprise one group of corresponding left eye respectively, the left projector 1 of right eye and right projector 2, described left projector 1 and right projector 2 include light source 3, projection lens 4, prism 9, R optical filtering passage 5 side by side, G optical filtering passage 6 and B optical filtering passage 7, described R optical filtering passage 5 comprises first dichronic mirror 50 of transmit red light reflect green light and blue light, the first single bandpass filter 51 and first catoptron 52, described light source 3, first dichronic mirror 50, the first single bandpass filter 51 and first catoptron 52 are arranged in order, described G optical filtering passage 6 comprises second dichronic mirror 60 of transmit blue reflect green light, second single bandpass filter 61, described second dichronic mirror 60, second single bandpass filter 61, prism 62 and projection lens 4 are arranged in order, described B optical filtering passage 7 comprises second catoptron 70 that is arranged in order, the 3rd single bandpass filter 71 and the 3rd catoptron 73, the front side of described prism 62 and both sides are equipped with a slice LCD63, and the light beam that three optical filtering passages produce is respectively from the LCD incident of three faces of prism.

Described light source 3 is argon arc lamp or extra-high-pressure mercury vapour lamp.

The utility model is by being arranged on the single bandpass filter in the projector, with the R behind the light source process dichronic mirror of left projector 1 and right projector 2, G, three passages of B are cut apart once more, generate R1 respectively, G1, B1 combination and R2, G2, the B2 combination, shine the 3LCD device respectively by two groups of light sources again, after converging by prism apparatus, produce the left side of the same performing content that becomes to have certain parallax, eye image. when the image that has a small parallax when two width of cloth is thrown simultaneously on projection screen 8, spectators watch by the anaglyph spectacles of wearing special light transmission, left eye receives only " left-eye image ", right eye receives only " eye image ". because the physiological property of human eye, will in brain, present three-dimensional visual effect. the light source wave band R1 that the single bandpass filter of process is cut apart once more, G1, B1 with and R2, G2, B2 forms complementation, do not have overlapping, as shown in Figure 2, make the right and left eyes eyeglass of anaglyph spectacles can receive projector 1 respectively, the image that projector 2 launches and interference-free each other.

The utility model with about two projectors be one group, light source 4 is argon arc lamp or extra-high-pressure mercury vapour lamp; The first dichronic mirror transmit red light (R wave band) reflects green, blue light (G, B wave band); The second dichronic mirror transmit blue (B wave band), reflect green light (G-band).For single bandpass filter of two corresponding in one group projectors, it is R1, G1, B1 wave band that the logical wave band of its band is respectively one, and another is R2, G2, B2 wave band, and the relation that R1, G1, B1 combination and R2, G2, B2 make up as shown in Figure 3.Prism can converge three-beam into a branch of, through projection lens picture is incident upon on the projection screen.

Claims

1. 3 D stereo projector, it is characterized in that, comprise one group of corresponding left eye respectively, the left projector of right eye and right projector, described left projector and right projector include light source, projection lens, prism, R optical filtering passage side by side, G optical filtering passage and B optical filtering passage, described R optical filtering passage comprises first dichronic mirror of transmit red light reflect green light and blue light, the first single bandpass filter and first catoptron, described light source, first dichronic mirror, the first single bandpass filter and first catoptron are arranged in order, described G optical filtering passage comprises second dichronic mirror of transmit blue reflect green light, second single bandpass filter, described second dichronic mirror, second single bandpass filter, prism and projection lens are arranged in order, described B optical filtering passage comprises second catoptron that is arranged in order, the 3rd single bandpass filter and the 3rd catoptron, the front side of described prism and both sides are equipped with a slice LCD, and the light beam that three optical filtering passages produce is respectively from the LCD incident of three faces of prism.

2. a kind of 3 D stereo projector according to claim 1 is characterized in that described light source is argon arc lamp or extra-high-pressure mercury vapour lamp.

3. a kind of 3 D stereo projector according to claim 1 and 2, it is characterized in that the logical wave band of the band of first single bandpass filter, second single bandpass filter and the 3rd single bandpass filter of logical wave band of the band of first single bandpass filter of described left projector, second single bandpass filter and the 3rd single bandpass filter and right projector is a complementary relationship.