High-contrast Encoding Method for Amplitude-only Computer Generated Hologram

Jungkwuen An; Bongsu Shin; Chang Kun Lee; Chil Sung Choi; Chorong Yoo; Geeyoung Sung; Hojung Kim; Hoon Song; Jae Seung Chung; Juwon Seo; Kanghee Won; Sung Hoon Lee; Sunil Kim; Wontaek Seo; Yongkyu Kim; Young Kim; Yun Tae Kim; Hong Seok Lee; Duckhyung Lee

doi:10.1002/SDTP.12489

High-contrast Encoding Method for Amplitude-only Computer Generated Hologram

Jungkwuen An, Bongsu Shin, Chang Kun Lee, Chil Sung Choi, Chorong Yoo, Geeyoung Sung, Hojung Kim, Hoon Song, Jae Seung Chung, Juwon Seo, Kanghee Won, Sung Hoon Lee, Sunil Kim, Wontaek Seo, Yongkyu Kim, Young Kim, Yun Tae Kim, Hong Seok Lee, Duckhyung Lee

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

The new encoding methods are proposed and demonstrated for amplitude-only computer-generated hologram (CGH). Traditionally, the amplitude-only encoding method proposed by Burch, has been used over 50 years, because it is the deterministic solution for generating an ideal hologram added by its conjugated hologram. Since the amplitude-only hologram cannot represent negative values, the result of Burch's encoding should always be added by some values, so that none of data is less than zero. It means that the electric-field of zero amplitude mapped into the medium gray level in a spatial light modulator (SLM). In ideal holographic display, it does not cause any problem on reconstructing holograms, but the medium gray level actually adds the noise at the practical holographic display. We introduce the encoding methods which can map the zero amplitude into the zero gray level. These encoding methods can increase the contrast ratio of an amplitude-only hologram by reducing unnecessary scattering and stray lights.

Original language	English
Pages (from-to)	64-67
Number of pages	4
Journal	Digest of Technical Papers - SID International Symposium
Volume	49
Issue number	1
DOIs	https://doi.org/10.1002/SDTP.12489
Publication status	Published - 2018
Event	SID Symposium, Seminar, and Exhibition 2018, Display Week 2018 - Los Angeles, United States Duration: 20 May 2018 → 25 May 2018

Bibliographical note

Publisher Copyright:
© 2018 SID.

Keywords

3D
CGH
Holographic display
SLM
amplitude-only
encoding algorithm
high contrast

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10.1002/SDTP.12489

Cite this

An, J., Shin, B., Lee, C. K., Choi, C. S., Yoo, C., Sung, G., Kim, H., Song, H., Chung, J. S., Seo, J., Won, K., Lee, S. H., Kim, S., Seo, W., Kim, Y., Kim, Y., Kim, Y. T., Lee, H. S., & Lee, D. (2018). High-contrast Encoding Method for Amplitude-only Computer Generated Hologram. Digest of Technical Papers - SID International Symposium, 49(1), 64-67. https://doi.org/10.1002/SDTP.12489

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abstract = "The new encoding methods are proposed and demonstrated for amplitude-only computer-generated hologram (CGH). Traditionally, the amplitude-only encoding method proposed by Burch, has been used over 50 years, because it is the deterministic solution for generating an ideal hologram added by its conjugated hologram. Since the amplitude-only hologram cannot represent negative values, the result of Burch's encoding should always be added by some values, so that none of data is less than zero. It means that the electric-field of zero amplitude mapped into the medium gray level in a spatial light modulator (SLM). In ideal holographic display, it does not cause any problem on reconstructing holograms, but the medium gray level actually adds the noise at the practical holographic display. We introduce the encoding methods which can map the zero amplitude into the zero gray level. These encoding methods can increase the contrast ratio of an amplitude-only hologram by reducing unnecessary scattering and stray lights.",

keywords = "3D, CGH, Holographic display, SLM, amplitude-only, encoding algorithm, high contrast",

author = "Jungkwuen An and Bongsu Shin and Lee, {Chang Kun} and Choi, {Chil Sung} and Chorong Yoo and Geeyoung Sung and Hojung Kim and Hoon Song and Chung, {Jae Seung} and Juwon Seo and Kanghee Won and Lee, {Sung Hoon} and Sunil Kim and Wontaek Seo and Yongkyu Kim and Young Kim and Kim, {Yun Tae} and Lee, {Hong Seok} and Duckhyung Lee",

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AU - Shin, Bongsu

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AU - Yoo, Chorong

AU - Sung, Geeyoung

AU - Kim, Hojung

AU - Song, Hoon

AU - Chung, Jae Seung

AU - Seo, Juwon

AU - Won, Kanghee

AU - Lee, Sung Hoon

AU - Kim, Sunil

AU - Seo, Wontaek

AU - Kim, Yongkyu

AU - Kim, Young

AU - Kim, Yun Tae

AU - Lee, Hong Seok

AU - Lee, Duckhyung

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N2 - The new encoding methods are proposed and demonstrated for amplitude-only computer-generated hologram (CGH). Traditionally, the amplitude-only encoding method proposed by Burch, has been used over 50 years, because it is the deterministic solution for generating an ideal hologram added by its conjugated hologram. Since the amplitude-only hologram cannot represent negative values, the result of Burch's encoding should always be added by some values, so that none of data is less than zero. It means that the electric-field of zero amplitude mapped into the medium gray level in a spatial light modulator (SLM). In ideal holographic display, it does not cause any problem on reconstructing holograms, but the medium gray level actually adds the noise at the practical holographic display. We introduce the encoding methods which can map the zero amplitude into the zero gray level. These encoding methods can increase the contrast ratio of an amplitude-only hologram by reducing unnecessary scattering and stray lights.

AB - The new encoding methods are proposed and demonstrated for amplitude-only computer-generated hologram (CGH). Traditionally, the amplitude-only encoding method proposed by Burch, has been used over 50 years, because it is the deterministic solution for generating an ideal hologram added by its conjugated hologram. Since the amplitude-only hologram cannot represent negative values, the result of Burch's encoding should always be added by some values, so that none of data is less than zero. It means that the electric-field of zero amplitude mapped into the medium gray level in a spatial light modulator (SLM). In ideal holographic display, it does not cause any problem on reconstructing holograms, but the medium gray level actually adds the noise at the practical holographic display. We introduce the encoding methods which can map the zero amplitude into the zero gray level. These encoding methods can increase the contrast ratio of an amplitude-only hologram by reducing unnecessary scattering and stray lights.

KW - 3D

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KW - Holographic display

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High-contrast Encoding Method for Amplitude-only Computer Generated Hologram

Abstract

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Keywords

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