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Design of a single lens wavefront coded infrared camera.

Mahendra Pratap Singh, Neeraj Pandey, L M Pant

|August 12, 2025

Summary

This summary is machine-generated.

This study introduces a compact single lens infrared imaging system using wavefront coding. The design achieves consistent performance across wide fields of view and temperatures, enabling lightweight and low-cost infrared optics.

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Area of Science:

Optical Engineering
Infrared Imaging Systems

Background:

Traditional infrared imaging systems often face challenges with size, cost, and performance consistency over varying conditions.
Wavefront coding offers a potential solution for improving optical system robustness and adaptability.

Purpose of the Study:

To design a compact, single-lens infrared imaging system with a spatially invariant point spread function (PSF).
To achieve consistent optical performance across a wide field of view and a broad temperature range using wavefront coding.
To develop a lightweight, low-cost infrared imaging solution feasible with current manufacturing techniques.

Main Methods:

Employed wavefront coding with a generalized cubic phase mask on a single lens.
Utilized lens bending and aspheric surfaces to minimize initial aberrations like coma and spherical aberration.
Optimized the design for defocus and quadratic aberrations using the generalized cubic phase mask.

Main Results:

Achieved a spatially invariant PSF with consistent performance over a ±(4°×3°) field of view.
Demonstrated athermalization from -20°C to +60°C with nearly invariant Modulation Transfer Function (MTF).
Image simulations showed good quality recovery using Wiener de-convolution with a single on-axis PSF across temperature and field variations.

Conclusions:

The proposed single-lens infrared imaging system design is practical and manufacturable.
The wavefront coding approach effectively compensates for aberrations and environmental variations.
This design is suitable for developing compact, lightweight, and cost-effective infrared optical systems.