Spatial optical modulator (SOM): high-density diffractive laser projection display

Yun, Sangwoon; Song, Jay Hyok; Yeo, Injae; Choi, Yong-Sung; Yurlov, Victor; An, Sung Yong; Park, HeungWoo; Yang, Hilda; Lee, Yeong-Gyu; Han, Kyung-Lyong; Shyshkin, Ihar; Lapchuk, Anatoliy; Oh, Kwang W.; Ryu, Seung-Won; Jang, Jaewook; Park, Changsu; Kim, ChunGi; Kim, SunKi; Kim, Eung-ju; Woo, Ki-Suk; Yang, Jeong-Suong; Kim, EuiJoong; Kim, JooHong; Byun, SungHo; Lee, SeungWoo; Lim, OhkKun; Cheong, Jongpil; Hwang, Y.N.; Byun, GiYoung; Kyoung, JeHong; Yoon, Seok–Jin; Lee, JaeKwang; Lee, TaeWon; Hong, Seok-Kee; Hong, Yoonshik; Park, Dong-Hyun; Kang, JungChul; Shin, WooChul; Lee, SungIl; Oh, SungKyung; Song, Bong‐Gee; Kim, HeeYeoun; Koh, ChongMann; Ryu, Young-Gyoon; Lee, Hyunkee; Baek, YoungKi

doi:10.1117/12.714699

Cited by 15 publications

(5 citation statements)

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“…All these systems use a similar optical configuration for image formation and projection [131,133,138]. The contrast achievable with these types of 1D modulators is limited by the amplitude mismatch in the light reflected from the passive and active parts of the grating, and careful optimization is required for best performance [131,139,140]. Diffractive modulator technology with a 2D phase grating type light modulator was also reported [141].…”

Section: A Displays With Single-axis Scanningmentioning

confidence: 99%

Laser-based displays: a review

2010

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After the invention of lasers, in the past 50 years progress made in laser-based display technology has been very promising, with commercial products awaiting release to the mass market. Compact laser systems, such as edge-emitting diodes, vertical-cavity surface-emitting lasers, and optically pumped semiconductor lasers, are suitable candidates for laser-based displays. Laser speckle is an important concern, as it degrades image quality. Typically, one or multiple speckle reduction techniques are employed in laser displays to reduce speckle contrast. Likewise, laser safety issues need to be carefully evaluated in designing laser displays under different usage scenarios. Laser beam shaping using refractive and diffractive components is an integral part of laser displays, and the requirements depend on the source specifications, modulation technique, and the scanning method being employed in the display. A variety of laser-based displays have been reported, and many products such as pico projectors and laser televisions are commercially available already.

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Section: A Displays With Single-axis Scanningmentioning

confidence: 99%

Laser-based displays: a review

2010

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“…1 and Table 1. Illumination optics convert the incoming laser beam into a uniform line beam, suitable for illumination of the SOM, [5][6][7][8][9] which has a 1-D array of grating microstructures. When the beam is incident on the SOM, it is diffracted into multiple orders.…”

Section: Optical Design Of Som Module and Operational Principlesmentioning

confidence: 99%

“…The beam width in the Fourier Plane can be expressed as W filter ≥ 2 × NA x proj × f proj by removing the factor cos(45 + θ scan ) in expression (7). In the case without the use of DOE (Barker code), NA x proj is the same as NA x ill .…”

Section: Fourier Filtermentioning

confidence: 99%

SOM‐based projection module for mobile displays

Yang¹,

Yun²,

Song³

et al. 2010

J Soc Info Display

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Abstract— The development of a compact, efficient VGA projection module to be embedded in mobile devices is reported. The design incorporates laser/laser diode (LD) light sources, Schlieren optics, and a one‐dimensional diffractive spatial optical modulator (SOM). During development, the optical parameters were determined and the relationships between the parameters to optimize the optical specifications were derived. The resulting optimized specifications enable us to manufacture two types of optical modu les as compact as 13 cc and with as little as 10% speckle contrast ratio.

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“…Many different of SLMs have been commercialized, such as grating light valve, 1 digital micromirror device, 2 and spatial optical modulator. 3 These devices are all based on silicon technology. Organic materials, for example electroactive polymers (EAPs), are promising alternates for SLMs.…”

Section: Introductionmentioning

confidence: 99%

Electroactive polymer-based spatial light modulator with high reliability and fast response speed

et al. 2011

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An electroactive polymer (EAP)-based MOEMS spatial light modulator (SLM), which shows high reliability and fast response speed, is reported in this work. The reliability is achieved by designing the SLM without direct contact between electrodes and deformable EAP surface; while the fast response speed is obtained by optimizing the microstructure of the EAP material. The concept of SLM, material optimization approach, fabrication processes, as well as characterization methods, are described. The SLM is driven by relatively low voltage, which is 200 V dc and 60 V ac and the response time is 35 μs. The manufactured SLM shows no degradation or breakdown after millions of actuation cycles, indicating a good reliability of the device. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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Spatial optical modulator (SOM): high-density diffractive laser projection display

Cited by 15 publications

References 0 publications

Laser-based displays: a review

Laser-based displays: a review

SOM‐based projection module for mobile displays

Electroactive polymer-based spatial light modulator with high reliability and fast response speed

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