CN2036281U

CN2036281U - Stereoscopic projector

Info

Publication number: CN2036281U
Application number: CN88218976U
Authority: CN
Inventors: 马洪明; 何壁如
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-10-24
Filing date: 1988-10-24
Publication date: 1989-04-19

Abstract

The utility model discloses a stereoscopic projector. According to the ordinary projection magic lantern theory, the utility model is provided with a couple of M-shaped break angle reflectors, a project reflector and a polarizing filter under a convex-concave lens along the direction travel of light in sequence. Two images of pictures produced by different visual angles of the left and the right eyes go through the convex-concave lens, the right and left break angles reflectors, project reflector and the polarizing filter in sequence, and finally the images of pictures are projected on a screen, the stereoscopic images can be seen when a corresponding polarization glasses is wore. The utility model has the advantages of simple structure and convenient operation, and the utility model can regulate the reflected stereoscopic effects. The utility model can be widely used in teaching, medicine, etc.

Description

Stereoscopic projector

The utility model is a kind of optical projection apparatus of watching stereoscopic image.

Present common common image, many display effects as picture, magic lantern, film, TV etc. with plane, the three-dimensional sense of reality is poor.Though there are now three-dimensional film and stereotelevision to occur, its narrow application range, used equipment is complex and expensive also, also must watch maintaining distance enough far away simultaneously.Because viewing distance is far away, two diminish in the visual angle difference of being looked to produce on the object, and the stereo perception of Chan Shenging also reduces thereupon therefrom, so general viewing effect such as three-dimensional film, TV is not very good.And it is just rarer for the three-dimensional demonstration of images such as common photo, picture, magic lantern.

At present according to two visual angle about the people is when observing object different make institute becomes image slightly the principle of difference make various " solid " pictures or photo very not difficult, they can show as interlaced overlapping or two multi-form images such as separate independently separately.But how to make this potential " solid " image reduction and reproduction, and to make people can watch out the display effect of true stereo be present subject matter to be solved.

Make the reduction of this potential " solid " picture or photo and be rendered as the stereoscopic image of the sense of reality, often at present realize by means optics or machinery.For example utilize the principle of polarized light principle or different color light visual characteristic, can belong to optical instrument; And utilize people's persistence of vision characteristics, and adopt mechanical hook-up to make two images alternately occur making people to produce stereoscopic visual effect by certain frequency, can think mechanical means.Be many with what adopt optical instrument in this dual mode, what especially utilize the polarized light principle is many, because it is not only simple and convenient, and has the remarkable advantage that does not change the object realistic colour.As Chinese patent CN86202307 disclose a kind of with the polarized light principle three-dimensional map screen and reflect viewing system.But its existing problem is, owing to adopted the imaging screen is sandwiched in the middle form of two polaroids, therefore reflect the restriction that the image size of looking out just has been subjected to used polaroid size, can not exceed the scope that the polaroid area is allowed.Reflect and look effect in order to reach enough big image, certainly will will adopt corresponding large-area polaroid, this can greatly increase the cost that reflects the equipment of looking undoubtedly.

In addition, present solid is reflected viewing system generally all can not carry out local adjustment to actual stereoeffect of watching, so to using and improvement is reflected and looked effect inconvenience is also arranged.

One of the purpose of this utility model provides stereoscopic image projector a kind of simple in structure, effective.

Second purpose of the present utility model provides a kind of stereoscopic image projector that can regulate the stereos copic viewing effect.

The optical projection principle of the utility model projector is similar to projection magic lamp instrument commonly used at present.The light that light source sent of these projection magic lamp instrument is through a Fresnel lens that can make light focusing and homogenising, and projection supplies to watch on screen with throwing catoptron through a meniscus to make the video light that is projected picture that places on the Fresnel lens.The utility model projector is provided with the knuckle catoptron that a pair of M of being shape is placed at the rear of above-mentioned meniscus optical axis.Each knuckle catoptron all is made up of two level crossings of the state of forming an angle, and its effect is to make the light from meniscus change working direction.For the direction of turning back that makes light path can be regulated easily, these two level crossings are designed to the connection of hinged or other form and its angle can be regulated is favourable and suitable.A projection catoptron is respectively established on the opposite of each knuckle catoptron again, and a polaroid respectively is set thereafter again.The polarization direction of two polaroids should be different, generally are to make it vertical mutually.Like this, from the light of knuckle catoptron through projection catoptron and polaroid after just projection on projection screen.Can watch the stereoscopic image that the sense of reality is arranged after putting on corresponding polarising glass.Projection theory index path of the present utility model can be referring to accompanying drawing 1.Two width of cloth picture I of the different visual angles that same observing object system is made and II are placed side by side after the Fresnel lens, the light that light source sends is through Fresnel lens, make the visual light of Image to left 1 be crossed to the right side through meniscus, enter the knuckle catoptron on right side, after the direction of turning back through the projection catoptron on right side and polaroid and projection in the right side of screen.The visual light of Image to right II through similar process with regard to projected left side at screen.

Owing to have only optical axis could guarantee to make light behind meniscus, to be divided into two exactly from left and right sides image with the joining place of the two knuckle catoptrons that are the M shape is crossing when meniscus, enter the knuckle catoptron light path of a corresponding separately side respectively, therefore the integral form with these two the fixedly connected M of becoming shapes of knuckle catoptron suits, the adjustment operation when helping using.

Adjust the dirigibility of operation when using, the knuckle mirror design of M shape can be become the form that can rotate around this optical axis on perpendicular to the plane of meniscus optical axis in order to increase.The form that this knuckle mirror design can also be become can move along the direction of meniscus optical axis, thus make the distance between the two adjustable, reach the image that illustrates is reflected in change on screen size, to satisfy the demand of different showings.And the size variation that the image of looking out is reflected in institute on this moment screen to be size with used polaroid have nothing to do.

If the projection mirror design is become and can make left-right rotation and/or can make the form of pitch rotation around the transverse axis of its Width around the longitudinal axis of its length direction, just can change the mutual alignment relation of the left and right sides image light image that institute's projection goes out on screen easily by the angle of regulating the left and right sides pitching of projection catoptron.Thereby can and watch what of number according to different viewing distances, angle, make and reflect the stereos copic viewing effect that the image of looking out adjusts the optimum depth sense.

Because the utility model projector has adopted the polarized light principle to reproduce the stereos copic viewing effect, for ease of using in the occasion that big audience is arranged in teaching, medical science, propaganda etc., the screen that can adopt the surface to be coated with aluminium powder reflects to be looked, to reduce the common strong disadvantage of screen curtain diffuse reflection of reflecting, also can adopt the frosted glass screen to reflect and look.Because the structure of the utility model projector is very simple, easy to manufacture, cost is low, is easy to be made into according to different needs the normalized form of different sizes.And adopt the small projector of frosted glass screen form especially to be suitable for using in the family and to watch by day, thereby make and popularize in the family and watch stereotome or photo to become no longer difficulty.

Specifically introduce an embodiment below by accompanying drawing.

Fig. 1 projection theory index path of the present utility model

The structure of Fig. 2 the utility model projector

Present embodiment adopts is to be the simple form of example with common projection magic lamp.Fresnel lens (2) is arranged on light supply apparatus (1), one meniscus (3) is arranged on the support moving up and down, be mounted with a pair of one-tenth M integrally-built knuckle catoptron of shape (4) directly over its optical axis, it can rotate on the plane perpendicular to the meniscus optical axis around its central shaft.Each knuckle catoptron is by two hinged forming of level crossing, and its angle can be regulated and fix, and generally keeps about 90 °.The exterior angle end of each knuckle catoptron all is hinged with a transverse axis (9) that can rotate along himself major axis, and perpendicular and rotatable longitudinal axis (10) of socket it on is connected with on the longitudinal axis (10) and throws catoptron (5).Its Width of lower end edge of projection catoptron (5) is hinged with polaroid (6), and the polarization direction of left and right sides polaroid should be vertical mutually.During use, two width of cloth pictures of making by different visual angles (8) and be thrown into the surface of Fresnel lens (2), adjust the position and the angle of each lens and catoptron, can on screen (7), obtain the corresponding projection image of two width of cloth.When they are adjusted to a suitable mutual alignment, put on corresponding polarising glass and just can watch stereoprojection image that depth perception is good.

Claims

1, a kind of image projector, its projection optical path meniscus (3) and throw catoptron (5) and projection on screen (7), it is characterized in that being provided with and be a pair of knuckle catoptron (4) that the M shape is placed at the rear of meniscus (3) optical axis, two level crossings that each knuckle catoptron (4) is provided with by forming an angle are formed, the position relative with each knuckle catoptron is provided with projection catoptron (5), projection catoptron (5) is provided with polaroid (6) afterwards, this kind structure arrangement make from the light of light source through meniscus (3) after, pass through knuckle catoptron (4) more successively, projection catoptron (5) and polaroid (6) just projection mirror on screen (7).

2, projector as claimed in claim 1 is characterized in that said a pair of knuckle catoptron (4) is the one-piece construction for the M shape.

3, projector as claimed in claim 1 or 2 is characterized in that the angle between two level crossings of each knuckle catoptron (4) of said composition can be regulated.

4, projector as claimed in claim 1 or 2 is characterized in that adjustment can be done to move along the direction of meniscus (3) optical axis in the position of the knuckle catoptron (4) of said M shape.

5, projector as claimed in claim 1 or 2 is characterized in that the center of the knuckle catoptron (4) of said M shape is on the optical axis of meniscus (3), and can be axle with this optical axis, rotates on the plane perpendicular to this optical axis.

6, projector as claimed in claim 1 or 2 is characterized in that said projection catoptron (5) can rotate around the longitudinal axis of its length direction.

7, projector as claimed in claim 1 or 2 is characterized in that said projection catoptron (5) can rotate around the transverse axis of its Width.

8, projector as claimed in claim 1 or 2 is characterized in that said screen (7) can be curtain or the frosted glass that is coated with aluminium powder.