Optical: systems and elements – Compound lens system – With relay
Patent
1994-12-06
1997-05-27
Dzierzynski, Paul M.
Optical: systems and elements
Compound lens system
With relay
359792, 385119, 600168, 600181, G02B 2300
Patent
active
056337540
ABSTRACT:
Optical systems for endoscopes, borescopes, dental scopes, and the like which are characterized by having three groups of lenses of positive optical power and an external entrance pupil. Typically, all three groups of lenses are displaced from the pupil and focal planes. As a consequence, the displaced groups take part in the image transfer as well as in the pupil transfer. The optical power requirements can thus be shifted from one group to another, distributing as well as reducing the overall power requirement. Moreover, the aberration correction can also be shared between these groups. The first group, which conventionally has the highest optical power, and consequently a large amount of aberrations to be corrected, can in this way transfer some of the optical aberration correction to the other groups. The sharing of the optical functions and aberration correction results in a fully integrated optical system. The reduction in the total amount of optical power is so large that a line-of-sight deviating prism can be readily accomodated between the entrance pupil and the first lens group. The resulting simplicity of the optical system makes it suitable as a disposable item.
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The Primary Aberration Characteristics . . . of Relay Systems, S.J. Dobson & J. Ribeiro, Meas. Sci. Technol. 5(1994) pp. 32-36.
Nintendo Surgery M. Thomas, Optics & Phor. News Jul. 1994 pp. 6-7.
Dzierzynski Paul M.
Jr. John Juba
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