Research and Development of the Basic Optical Systems with the Remote Entrance Pupil (OSRP)

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Research and Development of the Basic Optical
Systems with the Remote Entrance Pupil (OSRP)
Alexander Serebryakov
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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

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Main Tasks of the Research

• the synthesis of the basic OSRPs
• developing a computational algorithm for the
  design of the most commonly used OSRPs

Problems of the OSRP design

• asymmetry of the construction
• increase of the lenses diameters

• 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 ?
• The synthesis of optical system from optical
  components, which have known aberration
  characteristics.
• The transformation of optical system prototype

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Designing Optical System from Infinite-thin
Components with Main Parameters P, W and ?

• 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.

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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
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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.

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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 SISIISIII0)
• nf near-focal surface (SISIISIII0)
• c concentric-pupil surface (SIISIII0)
• 0 flat surface (SISIISIIISIV0 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(??),
  C(cc)B(ac)B(ac)C(b0) etc. (in total 16
  combinations).

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The combination B(0c)C(??).
, the pupil-offset is
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The combination B(0,gnc,c)C(b0).
, the value is also small.
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The combination C(cc)B(ac)B(ac)C(b0).
the pupil-offset is
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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

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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 SIISIIISIchr0 (small aperture)
• in case SISIISIchr0 (large aperture)
• The design of the thin component from the known
  values of P, W and C.
• The optimization.

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The viewfinders lens14 50 sp-f/2

• The present algorithm allows to design the base
  RPO systems with the following characteristics
• when SISIISI??0 14, pupil offset 0.5f,
  field angle 30? with the photographic image
  quality
• when SIISIIISI??0 ? 120, pupil offset 0.15f,
  field angle 15? with the diffractional image
  quality

The scanning devices lens120 10
sp-0.1f?Wlt0.02?
The endoscope lens14 70 B(0k)B(ak)B(ak)
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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)
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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