P‐93: Experiments on Thermal Induced Effect of PBS for LCoS System

Ou, C. R.; Lee, W. T.; Yaung, C. F.; Lin, H.K.; Wu, Yidi; Yoo, Jinn-Chou

doi:10.1889/1.1832022

Cited by 2 publications

(1 citation statement)

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“…A wire-grid PBS is capable of extremely high contrast and eliminates the need for expensive low-stress-birefringent glass for prism parts. 3 On the other hand, a plate beamsplitter requires a longer back focal length, which increases the burden to an already difficult projection-lens design. A field lens, used between the PBS and the LCOS panel, helps reduce the size of the imaging optics assembly, which results in significant cost savings.…”

Section: Introductionmentioning

confidence: 99%

Contrast behavior of a field lens with a wire-grid PBS

Shahzad¹,

Shimizu²

2006

J. Soc. Inf. Display

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Abstract— In an LCOS projection system, a wire‐grid PBS may be used to improve contrast and a field lens may be employed to simplify the projection lens. However, the combination of the two leads to a reduced contrast, which decreases with increasing field angle in one direction. In a representative arrangement, measured contrast with a mirror varied from over 10,000 in the center to 450 at the left and right edges. Contrast loss can be improved with a weaker field lens. The problem arises due to a phase delay between polarization states introduced by the wire grid. Polarization measurements show a +53‐nm phase delay with an axis parallel to the wire‐grid surface normal. Various compensation schemes are proposed in order to reduce the aforementioned loss of contrast.

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Section: Introductionmentioning

confidence: 99%

Contrast behavior of a field lens with a wire-grid PBS

Shahzad¹,

Shimizu²

2006

J. Soc. Inf. Display

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P‐111: The Mechanical‐Optical Properties of Wire‐Grid Type Polarizer in Projection Display System

Ho¹,

Chen²,

Fang³

et al. 2002

Symp Digest of Tech Papers

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In order to eliminate the thermal issues of the polymer based polarizer and thermal induce birefringence of bulky PBS, the wire-grid type polarizer is a promising optical component.However, as a part of the imaging optics, mechanical holding may affect the image qualities. In this article, two configurations for using wire-grid polarization are introduced. The image defects including astigmatism and distortion due to improper mechanical holding are evaluated.

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P‐93: Experiments on Thermal Induced Effect of PBS for LCoS System

Cited by 2 publications

References 1 publication

Contrast behavior of a field lens with a wire-grid PBS

Contrast behavior of a field lens with a wire-grid PBS

P‐111: The Mechanical‐Optical Properties of Wire‐Grid Type Polarizer in Projection Display System

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