LAMP COVER FOR A FLASH UNIT

WIPO Patent Application WO/2012/060777

A3

The present application provides a lamp cover (202, 278, 346, 358, 386, 394) for closing a window (43) of a flash unit (200, 276). The lamp cover (202, 278, 346, 358, 386, 394) comprises a first array of optical zones (254, 330, 347, 361, 388, 390, 392, 396) that are contiguously connected to each other on a surface (63) of the lamp cover (202, 278, 346, 358, 386, 394). One or more of the optical zones (202, 278, 346, 358, 386, 394) have a pitch (255, 342, 362) of 0.07 millimeter at most for visually blurring objects (34, 36, 38, 44, 48, 54, 56) placed behind the lamp cover (202, 278, 346, 358, 386, 394). The application also provides a method for making or using the flash unit (200, 276), which comprises a step of sealing the window (43) with the lamp cover (202, 278, 346, 358, 386, 394). The application further provides a method for making the lamp cover (202, 278, 346, 358, 386, 394), which comprises a step of injecting a molten optical plastic material into a mould insert (262) for providing optical zones (254, 330, 347, 361, 388, 390, 392, 396) or Fresnel zones (254, 330, 347, 361, 388, 390, 392, 396) and a step of detaching the lamp cover (202, 278, 346, 358, 386, 394) from the mould insert (262).

ZHOU JIANGHONG (SG)

PCT/SG2011/000384

September 27, 2012

October 28, 2011

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XENON TECHNOLOGIES PTE LTD (SG)
ZHOU JIANGHONG (SG)

F21V5/04; F21V3/02; G03B15/02

WO2004084265A2

2004-09-30

US20100165489A1	2010-07-01
US20100178046A1	2010-07-15
JP2010197919A	2010-09-09
JP2007073469A	2007-03-22
JP2008218186A	2008-09-18

KANG, Alban et al. (2 Shenton Way #18-01SGX Centre 1, Singapore 4, SG)

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