Projection optical system and light quantity control assembly for same
A projection optical system and light quantity control technology, applied in the field of projection optical systems, can solve the problems of maintaining the working temperature range, lamp temperature rise, temperature sudden rise, etc., so as to reduce adverse effects, reduce lamp temperature rise, and reduce light quantity. Effect
Inactive Publication Date: 2011-03-30
CORETRONIC
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[0003] However, the material of the aperture disc 106 in the conventional design is usually aluminum alloy or stainless steel, so the surface is quite smooth and bright. The disk 106 will block most of the light that should originally enter the light integrating column 108. At this time, on the one hand, the aperture disk 106 will be easily burned due to the sudden rise in temperature caused by the concentrated light, and on the other hand, the aperture disk 106 will block the The light reflects back to the light source 102, causing the lamp temperature to rise significantly and not conducive to maintaining the lamp temperature within its proper operating temperature range
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[0047] The aforementioned and other technical contents, features and functions of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referring to the directions of the drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention.
[0048] FIG. 3 is an exploded view showing a projection optical system 10 according to an embodiment of the present invention. Referring to Fig. 3, the projection optical system 10 comprises a light source 12, a color wheel (color wheel) 14, an aperture disc (aperturedisk) 16, a light integrator rod (light integrator rod) 18, an imaging device (digital micromirror device 22 ), a condenser lens (condenser lens) 24, a mirror 26, a relay lens (relay lens) 28, and a projection lens (projection lens) 32. Altho...
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The invention relates to a projection optical system which comprises a light source, a light homogenizing assembly, a light quantity control assembly, an imaging device and a projecting lens. The light quantity control assembly is arranged on a transmitting path of an illuminating bundle emitted by a light source and positioned between the light source and the light homogenizing assembly; a notchis defined on the light quantity control assembly, the width of the notch changes along the extending direction of the notch, and one light facing side of the light quantity control assembly irradiated by the illuminating bundle is provided with a surface structure for irregularly scattering the illuminating bundle. The invention relates to the projection optical system with longer service life and favorable contrast, and also relates to the light quantity control assembly used for the projection optical system.
Description
technical field [0001] The invention relates to a projection optical system with long service life and good contrast, and a light quantity control component used in the projection optical system. Background technique [0002] Referring to FIG. 1 , a conventional projection optical system 100 includes a light source 102, a color wheel (colorwheel) 104, an aperture disk (aperture disk) 106, a light integrator rod (light integratorrod) 108, a digital micromirror device 110, A condenser lens 112 , a reflector 114 , a relay lens 116 , and a projection lens 118 . The aperture disc 106 is located between the color wheel 104 and the light integrating cylinder 108 and has a notch S. As shown in FIG. As shown in FIG. 2 , because the width of the notch S changes monotonically along the extending direction of the notch S (as shown in the figure, the width of the notch S changes from large to small in the clockwise direction). Therefore, when the aperture disc 106 is driven by the step...
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IPC IPC(8): G03B21/14G02B27/09
Inventor 陈郑贵钟佳琪
Owner CORETRONIC