Invention Grant
- Patent Title: Projection with curved speckle reduction element surface
- Patent Title (中): 具有弯曲斑点还原元件表面的投影
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Application No.: US12469727Application Date: 2009-05-21
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Publication No.: US08172403B2Publication Date: 2012-05-08
- Inventor: Barry D. Silverstein , Joseph R. Bietry , Gary E. Nothhard , Robert Metzger , Andrew F. Kurtz
- Applicant: Barry D. Silverstein , Joseph R. Bietry , Gary E. Nothhard , Robert Metzger , Andrew F. Kurtz
- Applicant Address: US NY Rochester
- Assignee: Eastman Kodak Company
- Current Assignee: Eastman Kodak Company
- Current Assignee Address: US NY Rochester
- Agent Kevin E. Spaulding
- Main IPC: G03B21/00
- IPC: G03B21/00 ; G03B21/14

Abstract:
In a coherent light projection system including an image forming system, a relay system, a speckle reduction element, and a projection subsystem, the relay system can have a first f-number, and the projection subsystem can have a second f-number less than the first f-number. The relay system can have a first working distance, and the projection subsystem can have a second working distance less than the first working distance. The image forming system can project an initial image having a first size, and an intermediate image can have a second size greater than or equal to the first size. The speckle reduction element can have a curved surface through which the intermediate image is transferred. The speckle reduction element can include a lenslet arrangement formed on a surface thereof. The speckle reduction element can be moved in a direction parallel to an optical axis of the speckle reduction element.
Public/Granted literature
- US20100296061A1 PROJECTION WITH CURVED SPECKLE REDUCTION ELEMENT SURFACE Public/Granted day:2010-11-25
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