Speckle reduction in laser projection systems

L. L. Wang

doi:10.1117/12.2316155

1 September 1996 Speckle reduction in laser projection systems

L. L. Wang

Proceedings Volume 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology; 2778CY (1996) https://doi.org/10.1117/12.2316155
Event: 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 1996, Taejon, Korea, Republic of

Abstract

In laser projection systems the observer in the far field of the image points of the screen will recognize serious speckle noise. There are many methods to reduce or eliminate speckles in the near field, by reducing or eliminating spatial or temporal coherence of the laser. But for far field, it is hardly possible to change coherence properties of laser sources. In this paper we propose a new method to eliminate speckles in the far field by using diffractive optical elements. Intensity modulation depth in the far field speckle pattern could be reduced to a few percent with keeping good beam quality.

Citation Download Citation

L. L. Wang "Speckle reduction in laser projection systems", Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 2778CY (1 September 1996); https://doi.org/10.1117/12.2316155

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available