A novel integrated catadioptric pick-up with ferrofluid cooling structure

Kazuhiko Yamanaka; Takuya Okuda; Tomoaki Tojo; Shinnich Ijima; Kazutoshi Onozawa; Daisuke Ueda; Junichi Kubo; Seiichiro Kitagawa

doi:10.1117/12.527941

A novel integrated catadioptric pick-up with ferrofluid cooling structure

Kazuhiko Yamanaka^*, Takuya Okuda, Tomoaki Tojo, Shinnich Ijima, Kazutoshi Onozawa, Daisuke Ueda, Junichi Kubo, Seiichiro Kitagawa

^*Corresponding author for this work

International College of Semiconductor Technology

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

Abstract

We propose an integrated catadioptric pick-up (ICPU) with ferrofluid cooling structure for optical disks like DVD. An objective lens and a holographic optical element (HOE) are integrated into a single optical element, called holographic catadioptric lens (HCL). This enables the integration of all optical components including a laser diode (LD) into a moving part of the ICPU. The gaps between the moving part and the fixed optical base are filled with a high-thermal-conductivity ferrofluid, which is supported by magnetic field. With this configuration, Joule heat generated in the moving part is effectively dissipated to the optical base through the ferrofluid without sacrificing the motion of the moving part for its fluidity. The optical characteristics and the cooling performances are applicable to the future extremely small optical disk systems.

Original language	English
Pages (from-to)	90-98
Number of pages	9
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5362
DOIs	https://doi.org/10.1117/12.527941
State	Published - 16 Aug 2004
Event	Advanced Optical and Quantum Memories and Computing - San Jose, CA, United States Duration: 27 Jan 2004 → 28 Jan 2004

Keywords

Catadioptric system
Cooling structure
Ferrofluid
Optical pick-up
Super resolution
Thermal conductivity

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10.1117/12.527941

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title = "A novel integrated catadioptric pick-up with ferrofluid cooling structure",

abstract = "We propose an integrated catadioptric pick-up (ICPU) with ferrofluid cooling structure for optical disks like DVD. An objective lens and a holographic optical element (HOE) are integrated into a single optical element, called holographic catadioptric lens (HCL). This enables the integration of all optical components including a laser diode (LD) into a moving part of the ICPU. The gaps between the moving part and the fixed optical base are filled with a high-thermal-conductivity ferrofluid, which is supported by magnetic field. With this configuration, Joule heat generated in the moving part is effectively dissipated to the optical base through the ferrofluid without sacrificing the motion of the moving part for its fluidity. The optical characteristics and the cooling performances are applicable to the future extremely small optical disk systems.",

keywords = "Catadioptric system, Cooling structure, Ferrofluid, Optical pick-up, Super resolution, Thermal conductivity",

author = "Kazuhiko Yamanaka and Takuya Okuda and Tomoaki Tojo and Shinnich Ijima and Kazutoshi Onozawa and Daisuke Ueda and Junichi Kubo and Seiichiro Kitagawa",

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journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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note = "null ; Conference date: 27-01-2004 Through 28-01-2004",

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A novel integrated catadioptric pick-up with ferrofluid cooling structure. / Yamanaka, Kazuhiko; Okuda, Takuya; Tojo, Tomoaki; Ijima, Shinnich; Onozawa, Kazutoshi; Ueda, Daisuke; Kubo, Junichi; Kitagawa, Seiichiro.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 5362, 16.08.2004, p. 90-98.

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

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AU - Tojo, Tomoaki

AU - Ijima, Shinnich

AU - Onozawa, Kazutoshi

AU - Ueda, Daisuke

AU - Kubo, Junichi

AU - Kitagawa, Seiichiro

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AB - We propose an integrated catadioptric pick-up (ICPU) with ferrofluid cooling structure for optical disks like DVD. An objective lens and a holographic optical element (HOE) are integrated into a single optical element, called holographic catadioptric lens (HCL). This enables the integration of all optical components including a laser diode (LD) into a moving part of the ICPU. The gaps between the moving part and the fixed optical base are filled with a high-thermal-conductivity ferrofluid, which is supported by magnetic field. With this configuration, Joule heat generated in the moving part is effectively dissipated to the optical base through the ferrofluid without sacrificing the motion of the moving part for its fluidity. The optical characteristics and the cooling performances are applicable to the future extremely small optical disk systems.

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