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Improved design for stray-light reduction with a hemispherical imager.

¹Center for Astrophysics and Space Sciences, University of California, San Diego, 0424, La Jolla, California 92093-0424, USA. abuffingon@ucsd.edu

|March 18, 2008

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This study introduces an improved baffle design for space platforms, replacing concentric vanes with a smooth curved surface. This innovation significantly reduces size, weight, and improves stray-light rejection for deep-space observation.

Area of Science:

Optical engineering
Space instrumentation
Astrophysics

Background:

Conventional labyrinth baffles are bulky and heavy for space applications.
Previous research demonstrated concentric vane baffles offer size and weight savings.
Effective stray-light reduction is critical for sensitive deep-space observations.

Purpose of the Study:

To present a novel, improved baffle design for visible-light stray-background reduction.
To enhance performance, reduce size and weight compared to prior baffle configurations.
To validate the new design's stray-light rejection capabilities.

Main Methods:

Replaced concentric vanes with a smooth curved surface in the baffle design.
Fabricated and tested the new baffle configuration.

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Conducted laboratory measurements of stray-light rejection performance.

Main Results:

The curved surface baffle offers simplified fabrication and handling.
Achieved substantial weight reduction compared to previous designs.
Demonstrated excellent stray-light rejection (approx. 10^-14) near bright light sources (3 degrees).

Conclusions:

The smooth curved surface baffle is a superior alternative to concentric vanes.
This design offers significant advantages for stabilized deep-space platforms.
The improved baffle enables enhanced performance in challenging observational conditions.