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Optical Engineering

Petzval sum in triplet design: trend or optimum value?
Author(s): Peter Kallo; Gabor Kovacs
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Paper Abstract

Based on the analysis of known, corrected, classical triplet type objectives and given the basic specification requirements, diagrams of the constructional length and image distance of their equivalent thin lens systems are prepared. By keeping the constructional length and image distance constant and applying simple formulas, the focal lengths and air gaps of the thin lens triplet variations can be generated. These variations can be used for selection based on any criteria, such as, for example, the Petzval sum. According to the original description of the Petzval sum, to our computational experiences and to the examples given, which were the results of precise corrections, we concluded that also in case of triplets, the designer should target the minimal Petzval sum, which is constrained only by the basic specification data.

Paper Details

Date Published: 1 October 1993
PDF: 5 pages
Opt. Eng. 32(10) doi: 10.1117/12.145376
Published in: Optical Engineering Volume 32, Issue 10
Show Author Affiliations
Peter Kallo, Magyar Honvedseg (Hungary)
Gabor Kovacs, Technical Univ. of Budapest (Hungary)

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