Housing for mounting modulation components and the method
A housing, mounting plate technology for use in image reproducers, projection devices, picture replicators, etc. using projection devices that addresses alignment problems, excessive constraints and thermal capacity of hermetic housings, and does not anticipate or provide thermal deformation and stress Birefringence and other problems, to achieve the effect of easy removal
Inactive Publication Date: 2010-04-28
MOXTEK INC
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Problems solved by technology
Also, the method of U.S. 2003 / 0117708 does not anticipate or provide a solution to thermal distortion and stress birefringence that may arise in a high thermal environment due to excessive confinement and heat capacity in the sealed enclosure
[0017] It can thus be seen that although wire grid polarizers and polarizing beamsplitters offer certain advantages when used in digital projection equipment, in order to obtain proper performance from these elements alignment problems and complexities caused by thermal expansion effects must be addressed
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[0038] The present description relates in particular to elements which form part of, or cooperate directly with, the device according to the invention. It is to be understood that elements not specifically shown or described may take various forms well known to those skilled in the art.
[0039] refer to figure 2 and 3 , shows a perspective view of the housing 100 for mounting the spatial light modulator 30 and its supporting polarizing element for the monochromatic modulation channel on the housing wall 104 inside the projection device 10, in In the preferred embodiment it is the blue channel. The monochromatic illumination I is directed onto a rotating mirror 31 which reflects the illumination I through the magnifying relay lens 82 and the annular aperture 102 and then into the housing 100 . Such as figure 1 shown, then along the O b The modulated light output by the axis is introduced into the reducing relay lens 28 for synthesis, and the projection optics. Modulator...
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A housing (100) for mounting a wire grid polarizing beamsplitter (122) and a spatial light modulator (30) in alignment with an output optical path comprises a front plate having an opening for admitting incident illumination provided along an illumination axis. A modulator mounting plate (110) is spaced apart from and parallel to the front plate, for mounting the spatial light modulator in the optical output path of the illumination axis. First and second polarizer support plates are spaced apart from each other and extend between the front plate and the modulator mounting plate. The respective facing inner surfaces of the first and second support plates provide coplanar support features for supporting the wire grid polarizing beamsplitter between the inner surfaces. The wire grid polarizing beamsplitter extends between the facing inner surfaces. The surface of the wire grid polarizing beamsplitter is a fixed angle with respect to the surface of the spatial light modulator on the modulator mounting plate. The fixed angle defining an output optical axis along the output optical path.
Description
technical field [0001] The present invention relates generally to digital imaging devices, and more particularly to frames and methods for mounting polarizing elements and reflective LCD spatial light modulators. Background technique [0002] Digital color projectors, originally introduced as small-scale imaging devices for the commercial display market, have steadily improved overall imaging performance and light output capabilities. However, there are still a number of significant technical hurdles for digital cinema projectors to compete with conventional film film projectors such as those used in theaters. Unlike conventional movie projectors, high-quality digital projector systems provide separate color modulation paths for red, green, and blue (RGB) image data. To project a full color image, the design of digital color projection equipment requires combining the monochromatic light beams with proper intensity and registration for carrying the image formed on each mono...
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IPC IPC(8): H04N9/31G03B21/14
CPCG03B21/14G03B21/005G03B21/145G03B21/2073
Inventor F·D·埃尔纳B·D·西尔弗斯坦
Owner MOXTEK INC