Optical system design of miniaturized star sensors: a method based on an evaluation function.

Area of Science:

• Optics and Photonics
• Aerospace Engineering
• Satellite Technology

Background:

• Star sensors are crucial for high-precision attitude measurement in satellites.
• Traditional star sensors are often too large and power-hungry for micro-satellite applications.
• Miniaturization is essential to expand star sensor utility in smaller spacecraft.

Purpose of the Study:

• To develop a theoretical framework for the miniaturization of star sensor optical systems.
• To propose and validate an evaluation function (Q) for quantifying optical system miniaturization.
• To design a compact, athermalized optical lens assembly for a miniaturized star sensor.

Main Methods:

• Formulation of theoretical approaches for optical system miniaturization.
• Elucidation of principles governing optical power distribution.
• Development and validation of an evaluation function (Q) through multi-lens group analysis.
• Design of a compact optical lens assembly based on the developed theory and function.

Main Results:

• A novel miniaturization theory and evaluation function (Q) were established.
• The efficacy of the evaluation function (Q) was validated using multiple lens group analysis.
• A compact optical lens assembly (f=30mm, F/2.3, 500-800nm, length=23.95mm) was successfully designed.
• The designed system is athermalized, maintaining performance from -40°C to 60°C.

Conclusions:

• The developed miniaturization theory and evaluation function (Q) are effective tools for designing compact optical systems.
• This research significantly enhances the applicability of star sensors in micro-satellite platforms.
• The findings pave the way for smaller, more efficient star sensors in future space missions.