- Patent Title: Projector with image plane modal vibration for speckle reduction
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Application No.: US15285047Application Date: 2016-10-04
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Publication No.: US09778478B1Publication Date: 2017-10-03
- Inventor: Daniel Robert Adema , Darren Pastrik , Graham Hill
- Applicant: CHRISTIE DIGITAL SYSTEMS USA, INC.
- Applicant Address: US CA Cypress
- Assignee: CHRISTINE DIGITAL SYSTEMS USA, INC.
- Current Assignee: CHRISTINE DIGITAL SYSTEMS USA, INC.
- Current Assignee Address: US CA Cypress
- Agency: Perry + Currier, Inc.
- Main IPC: G03B21/14
- IPC: G03B21/14 ; G02B27/48 ; G03B21/20 ; G03B21/00

Abstract:
A projector with image plane modal vibration for speckle reduction is provided. The projector includes: a laser light source; a light modulator; and optics that convey light from the laser to the modulator and project modulated light from the modulator, the optics comprising an image plane. The projector further includes: a surface comprising at least a first region located at the image plane, the first region being at least as large as an image formed at the image plane, the first region configured to one or more of transmit and reflect the image; and at least three actuators, positions of interaction of the actuators with the surface are asymmetric relative to the surface, the actuators configured to generate respective moving surface waves in the first region at respective frequencies, the respective frequencies comprising non-integer multiples of each other.
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