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Research and Development of the Basic Optical Systems with the Remote Entrance Pupil (OSRP). Alexander Serebryakov. Using the OSRP in Modern Optical Devices. Using a remote-pupil objective in combination with optical beam-deflectors elements ( prisms, mirrors )

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research and development of the basic optical systems with the remote entrance pupil osrp
Research and Development of the Basic Optical Systems with the Remote Entrance Pupil (OSRP)

Alexander Serebryakov

using the osrp in modern optical devices
Using the OSRP in Modern Optical Devices
  • Using a remote-pupil objective in combination with optical beam-deflectors elements (prisms, mirrors)
  • Using the OSRP for joining pupils (field lens)
  • Eyepiece
  • Erector system
main tasks of the research
Main Tasks of the Research
  • the synthesis of the basic OSRPs
  • developing a computational algorithm for the design of the most commonly used OSRPs
  • asymmetry of the construction
  • increase of the lenses diameters

Problems of the OSRP design

  • vignetting
  • the correction of the odd aberrations

Choice of Ways to the Design of the OSRPs.

  • Designing optical system from infinite-thin components with main parameters P, W and С
  • The synthesis of optical system from optical components, which have known aberration characteristics.
  • The transformation of optical system prototype
designing optical system from infinite thin components with main parameters p w and
Designing Optical System from Infinite-thin Components with Main Parameters P, W and С

In the first approximation most optical systems can be considered

as the systems consisting of thin components

Every component has three main parameters P, W, C which are defined by its dimension parameters and glasses.

These functional dependences are reversible.

designing optical system from infinite thin components with main parameters
Designing Optical System from Infinite-thin Components with Main Parameters

In the first approximation the image quality can be described by third order aberration theory.

For infinite-thin component the Seidel sums are:

The chief advantages

  • The algorithm of the component design by the main parameters P, W and C, which is realized in the software.
  • There is always a chance to estimate beforehand the possibility of aberration correction.

The chromatic sums are:

the synthesis of optical system from optical components which have known aberration characteristics
The Synthesis of Optical System from Optical Components, Which Have Known Aberration Characteristics
  • The optical system is built on the basis of power components (positive lenses B) with the following addition of necessary correction components (lenses C)
  • The aberration characteristics of separate surfaces and lenses are analysed
  • The principal concern is given to the components, in which the field aberration is eliminated.
  • Thus when optical system is designed from components, which are free from some aberrations, then in the ultimate optical system these aberrations are corrected a priori.
the synthesis of optical system from optical components which have known aberration characteristics1
The Synthesis of Optical System from Optical Components, Which Have Known Aberration Characteristics

The surfaces that are used in the lens design are symbolized in the following way:

  • a – aplanatic surface (appropriate Seidel sum are SI=SII=SIII=0);
  • nf – near-focal surface (SI=SII=SIII=0);
  • c – concentric-pupil surface (SII=SIII=0);
  • 0 – flat surface (SI=SII=SIII=SIV=0 in parallel beams);
  • gnc – glued normal concentric surface.

For the solution of the task of OSRP research there is possible to combine power and correction components e.g. B(0c), B(0,cnc,c)+C(аа), C(cc)+B(ac)+B(ac)+C(b0) etc. (in total 16 combinations).

the combination b 0 gnc c c b0 the value is also small
The combination B(0,gnc,c)+C(b0). , the value is also small.
the complex method which unites the advantages of the above mentioned ways
The Complex Method, Which Unites the Advantages of the Above-mentioned Ways.

· The synthesis of the basic optical system from the infinite-thin components with main parameters with addition of the components, which have the known aberration characteristics

  • · The calculation of the design values and the aberration characteristic estimation of the developed base system are made
  • · The transformation of optical system and improve the optical systems characteristics
the application of the method to the basic rpos synthesis

EP

The application of the method to the basic RPOs synthesis

The design of the basic RPO system on the base of the thick concentric meniscus and a power component

  • The variants of the system solution

For this basic system the following algorithm of design was offered:

      • The initialization of the input data
      • The solution of the dimensions calculation task.
      • The determination of the parameters P, W, and C
        • in case SII=SIII=SIchr=0 (small aperture)
        • in case SI=SII=SIchr=0 (large aperture)
      • The design of the thin component from the known values of P, W and C.
  • The optimization.
the viewfinders lens 1 4 50 s p f 2
The viewfinders lens1:4 50° sp=-f’/2

The present algorithm allows to design the base RPO systems with the following characteristics:

  • when SI=SII=SIхр=0 – 1:4, pupil offset 0.5f’, field angle 30with the photographic image quality
  • when SII=SIII=SIхр=0 1:20, pupil offset 0.15f’, field angle 15with the diffractional image quality

The scanning devices lens1:20 10° sp=-0.1f’W<0.02

The endoscopelens1:4 70° B(0k)+B(ak)+B(ak)

the synthesis of the basic systems of the eyepieces
The Synthesis of the Basic Systems of the Eyepieces

The analytical way to the definition of the correction possibilities on the example of the symmetric eyepiece

The Seidel sums of the symmetric eyepiece

Thus it is possible to judge about its correction possibility without the definition of the dimensional features of the eyepiece.

The synthesis of the wide-angle eyepiece with corrected distortion

B(0,cnc,k)+2B(t,0)+C(b,0)

conclusion
Conclusion
  • For the first time in the optical science the problem of the OSRP design as separate type of optical systems has been considered.
  • The comparative analysis and classification of patents for OSPR have been made.
  • The complex method of the OSPR development has been proposed.
  • The series of the basic OSRPs has been synthesized.
  • The several optoelectronic devices of the different use were designed on the base of the proposed ways and the basic OSRPs.

In total the research forms the base for following development of the OSRP in general and designing of the different units in particular