Design of a wavefront shearing interferometer useful for testing large aperture optical systems.

Area of Science:

• Optics and Optical Engineering
• Interferometry
• Optical Testing

Background:

• Testing large aperture, short focal length optical systems presents unique challenges.
• Traditional interferometers may require complex adjustments for precise wavefront analysis.
• Efficient white light compensation is crucial for practical interferometric applications.

Purpose of the Study:

• To describe the construction of a Drew type variable shear wavefront shearing interferometer.
• To detail mechanical arrangements for mirror and plate adjustments.
• To introduce a novel method for easy white light compensation.

Main Methods:

• Construction of a variable shear interferometer based on the Drew design.
• Implementation of specific mechanical arrangements for component adjustment.
• Development of a novel system for achieving white light compensation.

Main Results:

• The described interferometer is suitable for testing large aperture, short focal length optical systems.
• The mechanical design facilitates easy adjustment of mirrors and the dividing plate.
• The novel arrangement simplifies white light compensation.

Conclusions:

• The developed Drew type variable shear interferometer is a practical tool for optical system testing.
• The design offers advantages in ease of adjustment and white light compensation.
• The instrument's utility is demonstrated through sheared interferograms of lenses.