US 2003/0072012 A1Published application

Producing method of optical device, positioning master, optical device and projector

AssigneeSeiko Epson Corporation

InventorMasashi Kitabayashi

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Abstract

An attitude of a measurement reference surface of a positioning master is adjusted using an auto-collimator, the positioning master being disposed so that the adjusted measurement reference surface is located on a designed position, and the light beam irradiated from the measurement reference surface is detected by a CCD camera to set the reference position. A calibrated position relative to the designed position is set based on average optical characteristics obtained by a projection lens inspection apparatus as an initializing process and the CCD camera is moved to the calibrated position. An optical device is mounted and a position of a liquid crystal panel is adjusted while detecting the light beam irradiated from the light-irradiating surface of a cross dichroic prism of the optical device by the CCD camera and the liquid crystal panel is fixed with ultraviolet curing adhesive.

Claims10

Dependent claims

A producing method of an optical device, the optical device including a plurality of optical modulators that modulates a plurality of color lights in accordance with image information for each color light, and a color combining optical system having a plurality of light-incident surfaces for the optical modulators to be attached and a light-irradiating surface that combines and irradiates the color light incident on the light-incident surface, the method comprising the steps of:

setting a reference position of a light beam sensor for detecting a light beam irradiated from the light-irradiating surface of the color combining optical system based on a designed position of any one of the optical modulators relative to the color combining optical system;
obtaining optical characteristics of a projection optical system combined with the optical device to set a calibrated position relative to the designed position;
moving the light beam sensor to the calibrated position;
mounting an optical device to be adjusted;
adjusting the position of the optical modulator while detecting the light beam irradiated from the light-irradiating surface of the color combining optical system by the light beam sensor;
and
fixing the position of the optical modulator of which position is adjusted.

4 more elements

Dependencies are inferred from the claim text.