Projection display
A display device and image display technology, applied in projection devices, image reproducers using projection devices, instruments, etc., can solve the problems of high cost of lighting optical units, high cost, inability to perform color separation, etc.
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Embodiment 1
[0098] Next, Embodiment 1 will be specifically described using FIGS. 10 to 16 .
[0099] FIG. 10 is a view showing a lens of Example 1. FIG. FIG. 11 is a diagram showing lens data of Example 1. FIG. FIG. 12 is a map showing the first embodiment. FIG. 13 is a graph showing the performance of the grating in the image display device of the first embodiment. 14 is a cross-sectional view showing a rotationally asymmetric optical element (lens) of Example 1. FIG. FIG. 15 is a map showing beam traces in the image display device formed by the difference in the position of the light-emitting part in Example 1. FIG. FIG. 16 is a beam tracing diagram showing beam broadening due to the size of the light emitting unit in the first embodiment.
[0100] Although the difference of Fig. 10 with respect to the schematic diagram Fig. 1 is that the representation of the auxiliary reflector 3 is omitted and the protective glass 7 used when the bulb of the light emitting part is broken, but bec...
Embodiment 2
[0116] Embodiment 2 will be specifically described below using FIG. 17 to FIG. 20 .
[0117] FIG. 17 is a diagram showing a lens of Example 2. FIG. FIG. 18 is a diagram showing lens data of Example 2. FIG. FIG. 19 is a map of the second embodiment. FIG. 20 is a graph showing grating performance in the image display element of Example 2. FIG.
[0118] 17 is different from the schematic view in FIG. 1 in that the auxiliary reflector 3 is omitted and the cover glass 7 is disposed, but the description thereof is omitted because the basic functions are the same as those in FIG. 1 . In addition, the coefficients in FIG. 18 are coefficients of the free-form surface shape already explained in FIG. 5 .
[0119] The map in FIG. 19 is a map of light beams emitted from the central position of the light emitting unit 1 . 19A is the XY coordinates of the intersection point of the beams in the reflector 2 of the free-form surface shape, FIG. 19B is the XY coordinates of the intersection ...
Embodiment 3
[0125] Next, Embodiment 3 will be specifically described using FIG. 21 to FIG. 24 .
[0126] FIG. 21 is a diagram showing a lens of Example 3. FIG. FIG. 22 is a lens data diagram of Example 3. FIG. FIG. 23 is a map of the third embodiment. FIG. 24 is a graph showing grating performance in the image display element of Example 3. FIG.
[0127] 21 is different from the schematic diagram in FIG. 1 in that the auxiliary reflector 3 is omitted and the cover glass 7 is disposed, but the description thereof is omitted because the basic functions are the same as those in FIG. 1 . In addition, the coefficients in FIG. 22 are the coefficients of the free-form surface shape already explained in FIG. 5 .
[0128] The map of FIG. 23 is a map of light beams emitted from the center position of the light emitting unit 1 . FIG. 23A is the XY coordinates of the intersection point of the beams in the reflector 2 of the free-form surface shape, FIG. 23B is the XY coordinates of the intersectio...
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