Simple method for determination of parameters of cemented doublet

Area of Science:

• Optical Engineering
• Lens Design
• Metrology

Background:

• Cemented doublets are common optical components.
• Determining internal design parameters often requires destructive testing.
• Non-destructive evaluation methods are highly desirable.

Purpose of the Study:

• To develop a simple, noninvasive method for calculating inner design parameters of cemented doublets.
• To enable parameter calculation using only external optical and geometrical measurements.
• To avoid damaging the optical system during analysis.

Main Methods:

• Derivation of formulas based on paraxial optics.
• Utilizing measurements of lens thicknesses.
• Incorporating radii of curvature of outer surfaces, paraxial focal length, and focal point positions.

Main Results:

• A practical, noninvasive method for calculating cemented doublet inner design parameters has been successfully derived.
• The method relies on accessible optical and geometrical measurements.
• The technique was validated through practical application on a known doublet.

Conclusions:

• The proposed noninvasive method offers a valuable alternative to destructive testing for cemented doublets.
• Accurate determination of internal parameters is achievable through external measurements.
• This approach enhances the efficiency and preserves the integrity of optical system analysis.