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Measurement of spherical aberrations using a solid-state image sensor.

K Suzuki, I Ogura, T Ose

|March 11, 2010

Summary

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A new method improves spherical aberration measurement for photographic lenses using a solid-state linear image sensor, enhancing accuracy and efficiency over traditional techniques.

Area of Science:

Optical engineering
Metrology

Background:

The Hartmann test is a traditional method for measuring lens aberrations.
Limitations of photographic plates in the Hartmann test include lower accuracy and efficiency.

Purpose of the Study:

To develop an improved method for measuring spherical aberrations in photographic lenses.
To enhance the accuracy and efficiency of aberration measurements using modern technology.

Main Methods:

An improved Hartmann test was developed utilizing a solid-state linear image sensor.
Replaced photographic plates with the electronic image sensor for ray intersection detection.

Main Results:

The new method achieved high accuracy, with errors less than 0.3 micrometers.

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Measurement of ray intersection with the image plane was significantly faster, taking only seconds.

Experimental results for standard lenses closely matched known data.

Conclusions:

The solid-state linear image sensor offers a superior alternative to photographic plates for aberration testing.
The enhanced Hartmann test provides a precise and efficient tool for optical lens metrology.