CN201242611Y - Free curved surface perfect reflection type unaided eye optical prism - Google Patents

Abstract

The utility model relates to a free curved surface full reflection-type visual optical prism which comprises an incident plane positioned on the top surface, a spherical surface positioned at the left side and a free curved surface positioned at the right side. The incident plane can realize the purpose that light rays can enter the visual optical prism; the spherical surface positioned at the left side reflects the light rays entering the visual optical prism from the incident plane; the free curved surface positioned at the right side totally reflects the light rays reflected from the spherical surface back to the spherical surface; the light rays are finally refracted out from the spherical surface and are converged into a pupil A; and a magnified image can be seen when viewing the visual optical prism from the pupil. The full reflection-type visual optical prism can eliminate the chromatic aberrations such as the chromatism and distortion of the images and the like, and is small in light energy loss and clear in imaging, and can shorten optical distance and reduce the physical dimension of the product. The full reflection-type visual optical prism is a plastic optical prism which reduces the weight of the product, has less optical components, and is convenient to wear, simple in structure and shape, convenient to assemble, long in pupil distance, convenient to observe, big in amplification ratio and convenient to obverse a virtual image. The full reflection-type visual optical prism can be made at one time through injection molding and is high in efficiency, less in rejects, low in cost, good in economic benefits, simple to adjust when assembling the product and easy to ensure the tolerance value of emitting parallelism of the optical axle.

Description

The visual optical prism of freely curved face total reflection type

Technical field:

The utility model relates to the visual optical prism of freely curved face total reflection type, the visual optical prism is loaded on the glasses display the inside, the image that micro display chips in the glasses display shows, through sending into people's eyeball after the amplification of visual optical prism, this visual optical prism is because little, aberration of optical energy loss and distortion are little, so image is more clear, in order to guarantee picture quality.

Background technology:

At present, in glasses display ex hoc genus anne product, be extensive use of a kind of optical system of comparatively normal formula, images such as this system can virtual amplification TV, film equipment and DVD.Show that as Fig. 1, Fig. 2 the optical system of this normal formula is made up of following optical element: (1), convex lens D; (2), concave mirror B; (3), semi-permeable and semi-reflecting mirror C.Its principle of work is: the light of the image that display chip A is shown is mapped to earlier on the semi-permeable and semi-reflecting mirror C, turns back 90 again ⁰Be mapped on the concave mirror B that is coated with reflectance coating, and the light reflected back also passes through semi-permeable and semi-reflecting mirror C and the convex lens D eyes to the observer.The shortcoming following points that this system is main: (1), image quality are poor, mainly are that the long optical energy loss of route of light is big, and aberration, distortion are greatly; (2), optical element is many, manufacturing procedure is long, especially semi-permeable and semi-reflecting mirror plating one deck semi-transflective reflective membrane technology difficulty is big, production efficiency is low, waste product is many, cost height, deficiency in economic performance; (3), optical system is long, is contained in the glasses display, and volume is increased, and is worn on observer's head, makes nasal pressure big, easily causes tired.

In addition, the depth of parallelism of the emergent light axis of the left and right visual optical of present similar glasses display product system, guarantee by fitted position, do not design the adjusting mechanism of the depth of parallelism, therefore in the product assembling, to the depth of parallelism of left and right visual optical system emergent light axis, be difficult to guarantee, directly influenced the effect of observing.

The utility model content:

The purpose of this utility model provides the visual optical prism of freely curved face total reflection type, and its optical energy loss is little, shortens light path, and product design is dwindled; Optical element is few, and is in light weight, conveniently wears when being installed in glasses display and adjusts.

The visual optical prism of freely curved face total reflection type of the present utility model is achieved by the following technical solution:

A kind of visual optical prism of freely curved face total reflection type, it comprises: one is positioned at the plane of incidence of end face, realizes that light enters in the visual optical prism; One is positioned at the sphere in left side, will reflect away from the light that plane of incidence enters the visual optical prism; One is positioned at the free form surface on right side, and the light that free form surface will be penetrated from sphere is total reflection return of serve face again, and go out by refraction at spherical surface at last and be aggregated to pupil A, and the formation enlarged image of looking from pupil A toward the visual optical prism.

The front of above-mentioned described visual optical prism and back are the planes.

The front of above-mentioned described visual optical prism is parallel with the back.

Above-mentioned described visual optical prism is by injection molding.

Above-mentioned described visual optical prism is by the glass material manufacturing.

Above-mentioned described free form surface outside surface plating reflectance coating.

The top of above-mentioned described front and back is individual to be provided with boss, and the boss end face is protruding with rotating shaft.

The summit of the summit of above-mentioned plane of incidence, the summit of sphere, free form surface is (13.467 at the eccentric coordinate that is the YZ plane of initial point with pupil A, 28.86), (2.873,25.135), (0.694,31.146), plane of incidence deflection angle with respect to the horizontal plane is between-2 ° and-3 °, the radius of curvature R of sphere is between 345mm to 360mm, and described free form surface is to adopt following polynomial free form surface structure:

$z=\frac{{\mathrm{<figure-callout\; id="2"\; label="cr"\; filenames="Y200820188756E00101.png,Y200820188756E00111.png"\; state="\{\{state\}\}">cr</figure-callout>}}^2}{1+\sqrt{1-(1+k)c^2{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="Y200820188756E00101.png,Y200820188756E00111.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}}+\underset{j=2}{\overset{66}{\mathrm{\&Sigma;}}}{C}_j{X}^m{Y}^n$

Wherein, j=[(m+n) ²+ m+3n]/2+1, z is the rise of Z-direction, c is a vertex curvature radius,, k is the quadric surface coefficient, C _jBe multinomial coefficient, C _jValue is as follows:

The visual optical prism of the utility model freely curved face total reflection type compared with prior art has following advantage: 1, the utility model is by plane of incidence, sphere, free form surface is formed a special visual optical prism, wherein sphere and free form surface can be eliminated aberrations such as the aberration of image of display chip incident and distortion, again because sphere is total reflection, so optical energy loss is little, image quality is clear.2, shorten light path, product design is dwindled; 3, the utility model is a plastic optics prism, makes the weight saving of product, is convenient to wear.4, the optical element number is little, and planform is simple, is beneficial to assembling.5, pupil is convenient to observe apart from length.6, magnification is big, is beneficial to observe virtual image.7, processing technology is single injection-molded, efficient height, waste product is few, cost is low, good in economic efficiency.8, in the product assembling, adjust simply, easily guarantee optical axis outgoing parallelism tolerance numerical value.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is done detailed explanation:

Fig. 1 is the structural representation of traditional glasses display;

Fig. 2 is the structural representation of the optical system used of traditional glasses display the inside;

Fig. 3 is the optical schematic diagram of the utility model visual optical prism;

Fig. 4 is the stereographic map of an angle of the utility model visual optical prism;

Fig. 5 is the stereographic map of another angle of the utility model visual optical prism;

Fig. 6 is the structural representation after the utility model is installed support;

Fig. 7 is the utility model visual optical prism emergent light axis parallelism adjusting mechanism synoptic diagram;

Fig. 8 is the B-B partial enlarged drawing of Fig. 7;

Fig. 9 is the topology view after the utility model is installed in glasses display;

Figure 10 is the structural representation of spectacle frame;

Figure 11 is the vertical view of the utility model optical prism;

Figure 12 is the A-A schematic cross-section of Figure 11;

Figure 13 is effective perform region synoptic diagram of the utility model free form surface 3.

Embodiment:

As Fig. 3, Fig. 4, Fig. 5, Fig. 6, shown in Figure 7, the visual optical prism of freely curved face total reflection type of the present utility model comprises that one is positioned at the plane of incidence 1 of end face, realizes that light enters in the visual optical prism; One is positioned at the sphere 2 in left side, will reflect away from the light that plane of incidence 1 enters the visual optical prism; One is positioned at the free form surface 3 on right side, and the light that free form surface 3 will be penetrated from sphere 2 is total reflection return of serve face 2 again, and reflect go out by sphere 2 at last and be aggregated to pupil A, and from the past visual optical prism of the pupil A formation enlarged image of looking.The front 4 and the back 5 of visual optical prism are the planes, and the front 4 of visual optical prism is parallel with back 5.The visual optical prism can be by injection molding, also can be by the glass material manufacturing.Free form surface 3 outside surfaces plating reflectance coating.The top of front 4 and back 5 is individual to be provided with boss 6, and boss 6 end faces are protruding with rotating shaft 7, and free form surface is to be made of three space curves.

As shown in Figure 3, the visual optical prism of freely curved face total reflection type of the present utility model, it can replace the effect of traditional similar optical system fully, and its unique distinction is arranged.Display chip 12 will design an angle of inclination with the plane of incidence 1 of visual optical prism, when design visual optical prism, guarantee the dimensional parameters of the relative position relation between plane of incidence 1, sphere 2, the free form surface 3 and the characteristic parameter of free form surface 4, form the special optical structural system of the various aberrations (as aberration, distortion etc.) of fair copy system.The light of the image that shows when micro display chips in the glasses display 12 is totally reflected on the free form surface 3 behind the surface of sphere 2 through plane of incidence 1 back, by free form surface 3 reflection backs and be refracted to the picture rich in detail that pupil A place forms an amplification by sphere 2 and supply the observer to see.

The middle section of the utility model visual optical prism as shown in figure 12, B, C, D point are respectively the summit of plane of incidence 1, the summit of sphere 2, the summit of free form surface 3, each summit is (13.467 at the eccentric coordinate that is the YZ plane of initial point with pupil A, 28.86), (2.873,25.135), (0.694,31.146), plane of incidence 1 deflection angle β with respect to the horizontal plane is between-2 ° and-3 °, the radius of curvature R of sphere 2 is between 345mm to 360mm, and free form surface 3 is to adopt following polynomial free form surface structure:

$z=\frac{{\mathrm{<figure-callout\; id="2"\; label="cr"\; filenames="Y200820188756E00101.png,Y200820188756E00111.png"\; state="\{\{state\}\}">cr</figure-callout>}}^2}{1+\sqrt{1-(1+k)c^2{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="Y200820188756E00101.png,Y200820188756E00111.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}}+\underset{j=2}{\overset{66}{\mathrm{\&Sigma;}}}{C}_j{X}^m{Y}^n$

Wherein, j=[(m+n) ²+ m+3n]/2+1, z is the rise of Z-direction, c is a vertex curvature radius,, k is the quadric surface coefficient, C _jBe multinomial coefficient, C _jValue such as table 2:

Table 2

Be effective perform region synoptic diagram of free form surface 3 as shown in figure 13, this effective perform region is to be initial point with summit D, and the end points coordinate on the XY plane is (11,14), (11,14), (11 ,-8), (11 ,-8).

The adjusting mechanism of the visual optical prism emergent light axis depth of parallelism of freely curved face total reflection type of the present utility model comprises support 8 and adjusts screw 11, two boss 6 of visual optical prism are embedded into grooves on two sides 9 the insides of support 8 respectively, rotating shaft 7 on boss 6 end faces embeds axis hole 10 the insides at groove 9 tops, adjust wallboard precession boss 6 two bottom sides that screw 11 passes groove 9 bottoms respectively for two, leave hole for injecting glue 13 on the wallboard above the boss 6, hole for injecting glue 13 communicates with groove 9.1., in product assembling this adjusting mechanism compared with prior art has following advantage:, adjust simply, easily guarantee optical axis outgoing parallelism tolerance numerical value.2., simple in structure, fixed convenient and reliable.

As Fig. 6, Fig. 7, Fig. 8, shown in Figure 9, when left and right visual optical prism emergent light axis O and O1 in the glasses display occur when not parallel, adjust by left and right each two screw 11 on the adjustment support 8, make optical prism swing a △ θ angle up or down around rotating shaft 7, technical requirement with the depth of parallelism that reaches emergent light axis O and O1, after mixing up, injecting glue is fixed simultaneously for hole for injecting glue 13 in Fig. 8.

As shown in figure 10, two stands 8 can be installed on the rack connecting plate 16, and left and right visual optical prism is installed in the groove 14,15 from the bottom, is provided with support mounting hole 18 and display chip mounting hole 17 among Figure 10.

Claims (8)

1, a kind of visual optical prism of freely curved face total reflection type is characterized in that it comprises:

One is positioned at the plane of incidence (1) of end face, realizes that light enters in the visual optical prism;

One is positioned at the sphere (2) in left side, will reflect away from the light that plane of incidence (1) enters the visual optical prism;

One is positioned at the free form surface (3) on right side, and the light that free form surface (3) will be penetrated from sphere (2) is total reflection return of serve face (2) again, and reflect go out by sphere (2) at last and be aggregated to pupil A, and from the past visual optical prism of the pupil A formation enlarged image of looking.

2, the visual optical prism of freely curved face total reflection type according to claim 1 is characterized in that:

The front of visual optical prism (4) and back (5) are the planes.

3, the visual optical prism of freely curved face total reflection type according to claim 2 is characterized in that:

The front of visual optical prism (4) is parallel with back (5).

4, according to the visual optical prism of the arbitrary described freely curved face total reflection type of claim 1 to 3, it is characterized in that: the visual optical prism is by injection molding.

5, according to the visual optical prism of the arbitrary described freely curved face total reflection type of claim 1 to 3, it is characterized in that: the visual optical prism is by the glass material manufacturing.

6, according to the visual optical prism of the arbitrary described freely curved face total reflection type of claim 1 to 3, it is characterized in that: free form surface (3) outside surface plating reflectance coating.

7, according to the visual optical prism of the arbitrary described freely curved face total reflection type of claim 1 to 3, it is characterized in that: the top of positive (4) and back (5) respectively is provided with boss (6), and boss (6) end face is protruding with rotating shaft (7).

8, visual optical prism according to the arbitrary described freely curved face total reflection type of claim 1 to 3, it is characterized in that: the summit of described plane of incidence (1), the summit of sphere (2), the summit of free form surface (3) is (13.467 at the eccentric coordinate that is the YZ plane of initial point with pupil A, 28.86), (2.873,25.135), (0.694,31.146), plane of incidence (1) deflection angle with respect to the horizontal plane is between-2 ° and-3 °, the radius of curvature R of sphere (2) is between 345mm to 360mm, and described free form surface (3) is to adopt following polynomial free form surface structure:

$z=\frac{{\mathrm{cr}}^2}{1+\sqrt{1-(1+k)c^2{r}^2}}+\underset{j=2}{\overset{66}{\mathrm{\&Sigma;}}}{C}_j{X}^m{Y}^n$

Wherein, j=[(m+n) ²+ m+3n]/2+1, z is the rise of Z-direction, c is a vertex curvature radius,, k is the quadric surface coefficient, C _jBe multinomial coefficient, C _jValue is as follows:

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