A variable refractive null lens

Area of Science:

• Optical Engineering
• Metrology
• Manufacturing

Background:

• Null lenses are crucial for testing optical production, but typically require unique designs for each system.
• Existing null lenses are often system-specific, limiting their reusability and increasing costs.

Purpose of the Study:

• To propose and evaluate a variable null lens system for testing rotationally symmetric, nonspherical optical surfaces.
• To offer a flexible and reusable solution for optical testing during production.

Main Methods:

• The proposed system utilizes two aspheric plates, each introducing spherical aberration.
• Varying the spacing between these plates in a diverging beam alters the wavefront's effect.
• The system is designed for testing parabolas, aspheric plates with spherical mirrors, and other complex optical configurations.

Main Results:

• The variable null lens system demonstrates adaptability for testing diverse optical setups.
• Accurate testing of nonspherical optics is achievable by adjusting plate separation.
• Optimization techniques can determine optimal plate spacing for specific tests.

Conclusions:

• A single, adjustable null lens design can replace multiple system-specific null lenses.
• This variable null lens offers a cost-effective and efficient solution for optical production testing.
• The system provides a flexible platform for metrology of advanced optical components.