CN102004387B

CN102004387B - Full screen projection system with double helix screen

Info

Publication number: CN102004387B
Application number: CN2010102841751A
Authority: CN
Inventors: 耿征; 张赵行
Original assignee: Institute of Automation of Chinese Academy of Science
Current assignee: Institute of Automation of Chinese Academy of Science
Priority date: 2010-09-15
Filing date: 2010-09-15
Publication date: 2012-11-07
Anticipated expiration: 2030-09-15
Also published as: CN102004387A

Abstract

The invention relates to a full screen projection system with a double helix screen, comprising a projector and a rotating double helix screen, wherein the projector is located above the rotating double helix screen; through adjusting the space position of the projector, the relative position between the projector and the double helix screen is adjusted so that the center of a projection image light path projected by a lens on the projector is coincident with the center of the double helix screen, and a rectangle image surface at the lower end of the projection image light path is internally connected with an overlooking circle surface of the double helix screen, and thus full screen projection display in a cylinder is realized on the rotating double helix screen. The structure utilized in the invention is easy for implementation; because the rotating double helix screen with a certain vibration is separated from the projector, the imaging stability is increased; and because an extra optical element is not needed for changing the light path, the alignment error can be reduced, and a clear real three-dimensional image can be obtained.

Description

The full frame optical projection system of a kind of double helix screen

Technical field

The invention belongs to the stereo display technique field, relate to the used optical projection system of true three-dimensional imaging.

Background technology

Utilize the rotating screw curved surface to produce true 3-D view and must be enforcement abroad as display screen; The researchist of Texas Instruments has carried out extensive studies to the technology that laser scanning rotating screw curved surface produces true 3-D view, shields on the combination 3-D display that adds laser scanner technique at spiral and attempts; Germany D.Bahr etc. then utilizes atwirl simple helix curved surface display screen of three look laser scans, has formed colored true 3-D view.The true 3 D displaying method of this type has all adopted the integrated projection pattern of the projection that makes progress from the bottom; But do making the entire system complex structure like this, difficulty of processing is than higher, and the optical device positioning accuracy request is than higher, and if design improper, can reduce imaging region; Adopt projection from top to bottom the imaging system designs simplification optical system of system; Made full use of the imaging right cylinder that whole Rotating Double spiral screen rotation forms; And the Rotating Double spiral screen that will contain certain vibrations separates with projection arrangement, increased the stability of imaging; Do not need the additional optical device to change light path, reduced the alignment error that brings thus, can obtain clearly true 3-D view.

Summary of the invention

Not enough in order to solve the picture steadiness that prior art single face screen generated; And two-sided screen supporting construction stops the problem at visual angle; The objective of the invention is to design the true three-dimensional imaging projection structure of a uniqueness, for this reason, it is a kind of reliable and stable that the present invention provides; And do not block the visual angle basically, the optical projection system of the three-dimensional image that can in the imaging right cylinder that whole Rotating Double spiral screen rotation forms, come true.

In order to reach said purpose, the present invention proposes a kind of full frame optical projection system of double helix screen that on Rotating Double spiral screen, realizes full frame projection in the right cylinder, is made up of projection arrangement and double helix screen; Said projection arrangement is positioned at Rotating Double spiral screen top; Through the locus of adjustment projection arrangement, make relative position between projection arrangement and the double helix screen make the center of the projected image light path that projection lens projects on the projection arrangement goes out overlap with the center of double helix screen.

Beneficial effect of the present invention: the structure that the present invention adopts is easy to realize; And the Rotating Double spiral screen that will contain certain vibrations separates with projection arrangement, increased the stability of imaging; Do not need the additional optical device to change light path, reduced the alignment error that brings thus, can obtain clearly true 3-D view.The present invention adopts the imaging mode of projection from top to bottom; The designs simplification of this projection pattern the optical system of system; Made full use of the imaging right cylinder that whole Rotating Double spiral screen rotation forms; And the Rotating Double spiral screen that will contain certain vibrations separates with projection arrangement, increased the stability of imaging; Do not need the additional optical device to change light path, reduced the alignment error that brings thus, can obtain clear, stable true 3-D view.

Description of drawings

Fig. 1 a is the full frame optical projection system of double helix screen of the present invention;

Fig. 1 b is the vertical view of Fig. 1 a;

Fig. 1 c is the vertical view that contains light path of Fig. 1 a;

Fig. 1 d is the side view that contains light path of Fig. 1 a;

Fig. 2 is the light path side view during the projector main body horizontal positioned in the full frame optical projection system of double helix screen of the present invention;

The critical piece explanation:

Projection arrangement 1

Projector main body 11 projection lens 12

Angular setting plate 13 supports transverse axis 14

Support the longitudinal axis 15

Double helix screen 2

Main body 21 back shafts 22

Right cylinder imaging area 23 is overlooked disc 24

Turning axle 25

Projected image light path 3

Light path upper end rectangle diagram image planes 31 light path lower end rectangle diagram image planes 32

Central ray 33

Embodiment

Specify each related detailed problem in the technical scheme of the present invention below in conjunction with accompanying drawing.Be to be noted that described embodiment only is intended to be convenient to understanding of the present invention, and it is not played any qualification effect.

One, the full frame projection system main body of double helix screen

The framework of the full frame optical projection system of double helix screen, as illustrating with reference to figure 1a and Fig. 1 b: the present invention is made up of projection arrangement 1 and double helix screen 2; Said projection arrangement 1 is positioned at Rotating Double spiral screen 2 tops; Through the locus of adjustment projection arrangement 1, make relative position between projection arrangement 1 and the double helix screen 2 make the center of the projected image light path that projection lens projects on the projection arrangement 1 goes out overlap with the center of double helix screen 2.Said projection arrangement 1 comprises: projector main body 11, projection lens 12, angular setting plate 13, support transverse axis 14 and the support longitudinal axis 15; Projector main body 11 is positioned on the angular setting plate 13; Projection lens 12 is positioned at the left side of projector main body 11; Angular setting plate 13 links to each other with support transverse axis 14, supports transverse axis 14 and links to each other with the support longitudinal axis 15, supports the longitudinal axis 15 and stands on ground; With respect to angle that supports the longitudinal axis 15 and the length that supports transverse axis 14, make the center of the projected image light path 3 that projection lens 12 on the projection arrangement 1 projects overlap through angular setting plate 13 adjustment projector main body 11 with the center of double helix screen 2.

Said double helix screen 2 comprises: main body 21, back shaft 22, right cylinder imaging area 23, overlook disc 24 and turning axle 25; Double helix screen 2 is a double helix curved face type screen; Double helix curved face type screen and back shaft 22 centers are symmetrical, and are positioned at the below of projection arrangement 1.Main body 21 is supported by back shaft 22, overlooks disc 24 about turning axle 25 centers symmetry, is connected to the double helix screen in the light path lower end rectangle diagram image planes 32 and overlooks disc 24.Main body 21 rotation formation are that bottom surface, turning axle 25 are high right cylinder imaging area 23 to overlook disc 24 during imaging.

As illustrating with reference to figure 1c, Fig. 1 d: projection lens 12 is launched a branch of projected image light path 3 that is seen as an isosceles trapezoid from the side to double helix screen 2; Light path upper end rectangle diagram image planes 31 overlap with projection lens 12, and light path lower end rectangle diagram image planes 32 are the square cbfg among Fig. 1 d; Relative position between projection arrangement 1 and the double helix screen 2 makes the center of the projected image light path 3 that projection lens 12 projects overlap with the center of double helix screen 2, makes simultaneously to be connected in the light path lower end rectangle diagram image planes 32 to overlook disc 24.

Two, the angle of inclination of projection system main body

As illustrating: when making relative position between projection arrangement 1 and the double helix screen 2 make that the center of the projected image light path 3 that projection lens 12 projects overlaps with the center of double helix screen 2 with reference to figure 1d, Fig. 2; Make to be connected in the light path lower end rectangle diagram image planes 32 and overlook disc 24, angular setting plate 13 and with respect to support angle between the longitudinal axis 15 confirm be described below:

As shown in Figure 2, when projector main body 11 horizontal positioned on the ground the time projection lens 12 distance overhead be h=6.85cm; When projector main body 11 horizontal positioned on the ground the time; The square-shaped image lower end distance overhead that projection lens 12 is incident upon on the screen of vertically putting in the dead ahead is H; When total system such as Fig. 1 d put; When being connected in the light path lower end rectangle diagram image planes 32 when overlooking disc 24, record H=9.99cm; Record the distance L=47.2cm of projection lens 12 simultaneously to light path lower end rectangle diagram image planes 32; So can be by formula

θ = \tan^{- 1} \frac{H - h}{L},

Calculate the elevation angle of projected image light path 3 at this moment:

Simultaneously, the central ray 33 of projected image light path 3 also can be obtained by formula with the angle β of horizontal reference plane:

So, promptly in Fig. 1 f, make with the angle of projector main body 11 inclination β:

∠eod＝β＝14.9°，

The light path deviation angle of projector main body 11 is parallel with angular setting plate 13; With the certain angle of projector main body 11 inclinations; Adjust the relative distance between projection arrangement 1 and the double helix screen simultaneously; Make among Fig. 1 d central ray 33 perpendicular to light path lower end rectangle diagram image planes 32; Can make and be connected in the light path lower end rectangle diagram image planes 32 when overlooking disc 24; The center that guarantees the projected image light path 3 that the projection lens 12 on the projection arrangement 1 projects overlaps with the center of the right cylinder imaging area 23 of double helix screen 2 rotation formation, reaches the purpose that on Rotating Double spiral screen, realizes full frame Projection Display in the right cylinder.

The above; Be merely the embodiment among the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; Can understand conversion or the replacement expected; All should be encompassed in of the present invention comprising within the scope, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims

1. the full frame optical projection system of double helix screen is characterized in that: be made up of projection arrangement (1) and double helix screen (2); Said projection arrangement (1) is positioned at double helix screen (2) top; Through the locus of adjustment projection arrangement (1), make relative position between projection arrangement (1) and the double helix screen (2) make the center of the projected image light path that projection lens projects on the projection arrangement (1) goes out overlap with the center of double helix screen (2);

Said projection arrangement (1) comprising: projector main body (11), projection lens (12), angular setting plate (13), support transverse axis (14) and the support longitudinal axis (15); Projector main body (11) is positioned on the angular setting plate (13); Projection lens (12) is positioned at the downside of projector main body (11); Angular setting plate (13) links to each other with support transverse axis (14), supports transverse axis (14) and links to each other with the support longitudinal axis (15), supports the longitudinal axis (15) and stands on ground; Through the angle of angular setting plate (13) adjustment projector main body (11) with respect to the support longitudinal axis (15); With respect to the length that supports transverse axis (14), make the center of the projected image light path (3) that projection lens (12) on the projection arrangement (1) projects overlap through angular setting plate (13) adjustment projector main body (11) with the center of double helix screen (2);

Said double helix screen (2) comprising: main body (21), back shaft (22), right cylinder imaging area (23), overlook disc (24) and turning axle (25); Said double helix screen (2) is a double helix curved face type screen; Double helix curved face type screen is about back shaft (22) center symmetry; And be positioned at the below of projection arrangement (1); Main body (21) is supported by back shaft (22), overlooks disc (24) about turning axle (25) center symmetry, is connected to the double helix screen in the light path lower end rectangle diagram image planes (32) and overlooks disc (24);

It is that bottom surface, turning axle (25) are high right cylinder imaging area (23) that main body during imaging (21) rotation forms to overlook disc (24);

The light path deviation angle of projector main body (11) is parallel with angular setting plate (13); With the certain angle of projector main body (11) inclination; Adjust the relative distance between projection arrangement (1) and the double helix screen simultaneously; Make central ray (33) perpendicular to light path lower end rectangle diagram image planes (32); Make be connected in the light path lower end rectangle diagram image planes (32) said double helix screen overlook disc (24) time, make the center of the projected image light path (3) that projection lens (12) on the projection arrangement (1) projects overlap with the center of right cylinder imaging area (23).