Manufacturing apparatus of optical device, manufacturing method thereof and projector
First Claim
1. A manufacturing apparatus of an optical device that is used for a projector, the optical device including a plurality of optical modulators that respectively modulate each of a plurality of color lights in accordance with image information;
- and a color-combining optical device that combines the color lights modulated by the optical modulators to form an image light, the projector including a projection optical device that is disposed on a downstream of an optical path of the optical device and projects the image light formed by the optical device in an enlarged manner, the manufacturing apparatus, comprising;
a holding unit that holds the color-combining optical device at a predetermined position;
position adjusters that respectively hold the optical modulators and adjust positions of the optical modulators relative to the color-combining optical device;
dimension-measuring units that measure an external dimension of the color-combining optical device in an optical-axis direction; and
a controlling unit that drives the position adjusters, wherein the controlling unit includes;
a storage that stores distance information relating to a back-focus distance defined in accordance with specifications of the projection optical device;
a deviation-amount calculating unit that calculates a deviation amount of an optical path length of a light beam from the optical modulator to the projection optical device when the color-combining optical device is interposed between the optical modulator and the projection optical device based on the external dimension of the color-combining optical device in the optical-axis direction measured by the dimension-measuring units;
a back-focus-position calculating unit that calculates a back-focus position of the projection optical device in correspondence with a deviation of the optical path length based on the distance information stored in the storage and the deviation amount of the optical path length calculated by the deviation-amount calculating unit; and
a drive controller that drives the position adjusters and positions the optical modulators at the back-focus positions of the projection optical device in correspondence with the deviation of the optical path length calculated by the back-focus-position calculating unit.
1 Assignment
0 Petitions
Accused Products
Abstract
A manufacturing apparatus of an optical device that is used for a projector, the optical device including a plurality of optical modulators that respectively modulate each of a plurality of color lights in accordance with image information; and a color-combining optical device that combines the color lights modulated by the optical modulators to form an image light, the projector including a projection optical device that is disposed on a downstream of an optical path of the optical device and projects the image light formed by the optical device in an enlarged manner, the manufacturing apparatus, including: a holding unit that holds the color-combining optical device at a predetermined position; position adjusters that respectively hold the optical modulators and adjust positions of the optical modulators relative to the color-combining optical device; dimension-measuring units that measure an external dimension of the color-combining optical device in an optical-axis direction; and a controlling unit that drives the position adjusters, in which the controlling unit includes: a storage that stores distance information relating to a back-focus distance defined in accordance with specifications of the projection optical device; a deviation-amount calculating unit that calculates a deviation amount of an optical path length of a light beam from the optical modulator to the projection optical device when the color-combining optical device is interposed between the optical modulator and the projection optical device based on the external dimension of the color-combining optical device in the optical-axis direction measured by the dimension-measuring units; a back-focus-position calculating unit that calculates a back-focus position of the projection optical device in correspondence with a deviation of the optical path length based on the distance information stored in the storage and the deviation amount of the optical path length calculated by the deviation-amount calculating unit; and a drive controller that drives the position adjusters and positions the optical modulators at the back-focus positions of the projection optical device in correspondence with the deviation of the optical path length calculated by the back-focus-position calculating unit.
10 Citations
7 Claims
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1. A manufacturing apparatus of an optical device that is used for a projector, the optical device including a plurality of optical modulators that respectively modulate each of a plurality of color lights in accordance with image information;
- and a color-combining optical device that combines the color lights modulated by the optical modulators to form an image light, the projector including a projection optical device that is disposed on a downstream of an optical path of the optical device and projects the image light formed by the optical device in an enlarged manner, the manufacturing apparatus, comprising;
a holding unit that holds the color-combining optical device at a predetermined position;
position adjusters that respectively hold the optical modulators and adjust positions of the optical modulators relative to the color-combining optical device;
dimension-measuring units that measure an external dimension of the color-combining optical device in an optical-axis direction; and
a controlling unit that drives the position adjusters, wherein the controlling unit includes;
a storage that stores distance information relating to a back-focus distance defined in accordance with specifications of the projection optical device;
a deviation-amount calculating unit that calculates a deviation amount of an optical path length of a light beam from the optical modulator to the projection optical device when the color-combining optical device is interposed between the optical modulator and the projection optical device based on the external dimension of the color-combining optical device in the optical-axis direction measured by the dimension-measuring units;
a back-focus-position calculating unit that calculates a back-focus position of the projection optical device in correspondence with a deviation of the optical path length based on the distance information stored in the storage and the deviation amount of the optical path length calculated by the deviation-amount calculating unit; and
a drive controller that drives the position adjusters and positions the optical modulators at the back-focus positions of the projection optical device in correspondence with the deviation of the optical path length calculated by the back-focus-position calculating unit. - View Dependent Claims (2, 3, 4, 5)
- and a color-combining optical device that combines the color lights modulated by the optical modulators to form an image light, the projector including a projection optical device that is disposed on a downstream of an optical path of the optical device and projects the image light formed by the optical device in an enlarged manner, the manufacturing apparatus, comprising;
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6. A manufacturing method of an optical device that is used for a projector, the optical device including a plurality of optical modulators that respectively modulate each of a plurality of color lights in accordance with image information;
- and a color-combining optical device that combines the color lights modulated by the optical modulators to form an image light, the projector including a projection optical device that is disposed on a downstream of an optical path of the optical device and projects the image light formed by the optical device in an enlarged manner, the manufacturing method, comprising;
device-attaching for attaching the color-combining optical device at a predetermined position;
dimension-measuring for measuring an external dimension of the color-combining optical device in an optical-axis direction;
deviation-amount-calculating for calculating a deviation amount of an optical path length of a light beam from the optical modulator to the projection optical device when the color-combining optical device is interposed between the optical modulator and the projection optical device based on the external dimension of the color-combining optical device in the optical-axis direction measured in the dimension-measuring;
back-focus-position-calculating for calculating a back-focus position of the projection optical device in correspondence with a deviation of the optical path length based on the deviation amount of the optical path length calculated in the deviation-amount-calculating and distance information relating to a back-focus distance defined in accordance with specifications of the projection optical device;
optical-modulator-holding for holding the optical modulators by the position adjusters; and
positioning the optical modulators at the back-focus positions of the projection optical device in correspondence with the deviation of the optical path length calculated in the back-focus-position-calculating by driving the position adjusters.
- and a color-combining optical device that combines the color lights modulated by the optical modulators to form an image light, the projector including a projection optical device that is disposed on a downstream of an optical path of the optical device and projects the image light formed by the optical device in an enlarged manner, the manufacturing method, comprising;
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7. A projector, comprising:
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a light source device;
an optical device; and
a projection optical device that projects an image light formed by the optical device in an enlarged manner, wherein the optical device is manufactured by a manufacturing method, including;
device-attaching for attaching the color-combining optical device at a predetermined position;
dimension-measuring for measuring an external dimension of the color-combining optical device in an optical-axis direction;
deviation-amount-calculating for calculating a deviation amount of an optical path length of a light beam from the optical modulator to the projection optical device when the color-combining optical device is interposed between the optical modulator and the projection optical device based on the external dimension of the color-combining optical device in the optical-axis direction measured in the dimension-measuring;
back-focus-position-calculating for calculating a back-focus position of the projection optical device in correspondence with a deviation of the optical path length based on the deviation amount of the optical path length calculated in the deviation-amount-calculating and distance information relating to a back-focus distance defined in accordance with specifications of the projection optical device;
optical-modulator-holding for holding the optical modulators by the position adjusters;
positioning the optical modulators at the back-focus positions of the projection optical device in correspondence with the deviation of the optical path length calculated in the back-focus-position-calculating by driving the position adjusters.
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Specification