Switchable mirror lens system for redirecting laser energy during periods of non-printing

Patent metadata

Field	Value
Publication number	US-10054857-B2
Application number	US-201615354267-A
Country	US
Kind code	B2
Filing date	Nov 17, 2016
Priority date	Nov 17, 2016
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A laser imaging system and method for printing includes a digital micromirror device and a switchable mirror element that acts as a clear lens element during the printing by the laser imaging system. A laser diode array provides a laser to the switchable mirror element in a laser path, wherein the switchable mirror element is located in the laser path between the laser diode array and the digital micromirror device to divert energy out of the system and away from the digital micromirror device during periods of non-laser imaging without reducing or powering down the laser system.

First claim

What is claimed is:

1. A laser imaging system for printing, comprising:
a digital micromirror device and a switchable mirror element; and
a laser diode array that provides a laser to said switchable mirror element in a laser path, wherein said switchable mirror element is located in said laser path between said laser diode array and said digital micromirror device to divert energy out of said system and away from said digital micromirror device during periods of non-laser imaging without reducing or powering dawn the laser system and wherein said switchable mirror element acts as a clear lens element during said printing by said laser imaging system.

2. The system of claim 1 wherein said switchable mirror element comprises an electronic switchable mirror element.

3. The system of claim 1 wherein said switchable mirror element comprises a TMSM (Transition-Metal Switchable Mirror).

4. The system of claim 1 wherein said switchable mirror element comprises a glass panel with a coating that switches back and forth between a transparent state and a reflective state when activated electronically.

5. The system of claim 1 further comprising a laser dump wherein said system allows for both a transparent mode in which said laser is allowed to pass to said digital micromirror device and onto a thermos-chromatic ink and a reflective mirror mode that redirects a main incident laser to said laser dump.

6. The system of claim 1 further comprising a laser imaging module comprising said laser diode array, wherein said switchable mirror element comprises a non-mechanical switchable mirror that allows said laser to remain powered even during short print breaks in laser imaging while redirecting incident energy away from said digital micromirror device thereby reducing an operating temperature of a laser imaging module without inducing any mechanical vibration.

7. The system of claim 1 wherein said switchable mirror element is integrated into a print data stream that is actuated based on print data, process speeds, and media/ink presence.

8. A laser imaging system for printing, comprising:
a digital micromirror device and a switchable mirror element;
a laser diode array that provides a laser to said switchable mirror element in a laser path, wherein said switchable mirror element is located in said laser path between said laser diode array and said digital micromirror device to divert energy out of said system and away from said digital micromirror device during periods of non-laser imaging without reducing or powering down the laser system and wherein said switchable mirror element acts as a clear lens element during said printing by said laser imaging system; and
a laser dump wherein said system allows for both a transparent mode in which said laser is allowed to pass to said digital micromirror device and onto a thermos-chromatic ink and a reflective mirror mode that redirects a main incident laser to said laser dump.

9. The system of claim 8 wherein said switchable mirror element comprises an electronic switchable mirror element.

10. The system of claim 8 wherein said switchable mirror element comprises a TMSM (Transition-Metal Switchable Mirror).

11. The system of claim 8 wherein said switchable mirror element comprises a glass panel with a coating that switches back and forth between a transparent state and a reflective state when activated electronically.

12. The system of claim 8 further comprising a laser imaging module comprising said laser diode array, wherein said switchable mirror element comprises a non-mechanical switchable mirror that allows said laser to remain powered even during short print breaks in laser imaging while redirecting incident energy away from said digital micromirror device thereby reducing an operating temperature of a laser imaging module without inducing any mechanical vibration.

13. The system of claim 8 wherein said switchable mirror element is integrated into a print data stream that is actuated based on print data, process speeds, and media/ink presence.

14. A laser imaging method for printing, comprising:
providing a laser from a laser diode array to a switchable mirror element in a laser path, wherein said switchable mirror element is located in said laser path between said laser diode array and a digital micromirror device to divert energy out of said system and away from said digital micromirror device during periods of non-laser imaging without reducing or powering down the laser system and wherein said switchable mirror element acts as a clear lens element during said printing by said laser imaging system.

15. The method of claim 14 wherein said switchable mirror element comprises an electronic switchable mirror element.

16. The method of claim 14 wherein said switchable mirror element comprises a TMSM (Transition-Metal Switchable Mirror).

17. The method of claim 14 wherein said switchable mirror element comprises a glass panel with a coating that switches back and forth between a transparent state and a reflective state when activated electronically.

18. The method of claim 14 further comprising providing a laser dump wherein said system allows for both a transparent mode in which said laser is allowed to pass to said digital micromirror device and onto a thermos-chromatic ink and a reflective mirror mode that redirects a main incident laser to said laser dump.

19. The method of claim 14 further comprising providing a laser imaging module comprising said laser diode array, wherein said switchable mirror element comprises a non-mechanical switchable mirror that allows said laser to remain powered even during short print breaks in laser imaging while redirecting incident energy away from said digital micromirror device thereby reducing an operating temperature of a laser imaging module without inducing any mechanical vibration.

20. The method of claim 14 wherein said switchable mirror element is integrated into a print data stream that is actuated based on print data, process speeds, and media/ink presence.

Assignees

• Xerox Corp

Inventors

• Herrmann Douglas K
• Lefevre Jason M
• Mcconville Paul J
• Moore Steven R

Classifications

• G02B26/0833

  the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD (G02B26/0825 takes precedence; micromechanical devices in general B81B) · CPC title

• B41J2/447 Primary

  using arrays of radiation sources (B41J2/475 takes precedence) · CPC title

• G03F7/702 Primary

  Reflective illumination, i.e. reflective optical elements other than folding mirrors, e.g. extreme ultraviolet [EUV] illumination systems · CPC title

• B41J2/455

  using laser arrays {, the laser array being smaller than the medium to be recorded} · CPC title