scholarly journals An Optical Design for an Antarctic 2 m Telescope with a Near IR Imager

2002 ◽  
Vol 19 (3) ◽  
pp. 301-305 ◽  
Author(s):  
P. R. Gillingham
Keyword(s):  
Optical Design ◽  
Detector Array ◽  
Optical Performance ◽  
Primary Mirror ◽  
Low Level ◽  
Near Ir ◽  
Field Curvature ◽  
Ir Imager ◽  
Extraneous Radiation

AbstractA study has been made of the optical performance to be expected from an Antarctic Ritchey Chrétien telescope with a 2 m diameter primary mirror imaging directly onto a detector array in the K and L infrared windows. Near diffraction limited performance is provided across a flat 30 arcmin diameter field by compensating the astigmatism and field curvature with a meniscus lens which also serves as the Dewar window. With baffling inside and Narcissus mirrors outside the Dewar, extraneous radiation can be kept to a low level.

scholarly journals Optical Design of a Solar Dish Concentrator Based on Triangular Membrane Facets

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Hongcai Ma ◽  
Guang Jin ◽  
Xing Zhong ◽  
Kai Xu ◽  
Yanjie Li
Keyword(s):  
Focal Plane ◽  
Concentration Ratio ◽  
Collection Efficiency ◽  
Optical Design ◽  
Design Procedure ◽  
Diameter Ratio ◽  
Mean Square ◽  
Optical Performance ◽  
Space Antenna ◽  
Tracing Method

The design of a solar dish concentrator is proposed based on triangular membrane facets for space power applications. The facet concentrator approximates a parabolic surface supported by a deployable perimeter truss structure, which originates from a large aperture space antenna. For optimizing the number of facets rows and focal-diameter ratio of the concentrator, Monte Carlo ray-tracing method is utilized to determine optical performance of the concentrator, and the system root-mean-square (RMS) deviation is considered in this design procedure. A 600-facet concentrator with focal-diameter ratio of 1.1 will achieve 83.63% of radiative collection efficiency over a 15 cm radius disk located in the focal plane, with a mean solar concentration ratio exceeding 300. The study in this paper is helpful for the development of the membrane facet concentrator.

scholarly journals Optical Design for a Head-Mounted Display

1993 ◽  
Vol 2 (3) ◽  
pp. 185-202 ◽  
Author(s):  
Jiantao Ma ◽  
John M. Hollerbach ◽  
Ian W. Hunter
Keyword(s):  
Optical Design ◽  
Field Of View ◽  
Wide Field ◽  
Optical System Design ◽  
Head Mounted Display ◽  
Cost Constraints ◽  
Field Curvature ◽  
Folded Structure ◽  
Wide Field Of View ◽  
Color Field

This paper presents a design concept for a head-mounted display, incorporating color stereo vision using commercial LCDs and our own optical relay design. The focus here is on the optical system design, which must meet specifications for a wide field of view, size and cost constraints, and aberration minimization based on human factors. Two multispherical lens systems are presented and compared, one a straight structure and the other a folded structure, which satisfy the design constraints. Their aberrations (distortion, coma, lateral color, field curvature, and astigmatism) have been well corrected, according to human perceptual constraints explicitly discussed. Each has a 20-mm eye relief and an instantaneous field of view greater than 60°; the former has an exit pupil of 10 mm and the latter of 8 mm.

A Study on the Adhesive Effects on the Optical Performance of the Primary Mirror System of a Satellite Camera

2007 ◽  
Vol 51 (6) ◽  
pp. 1901 ◽  
Author(s):  
Yu-Deok Seo ◽  
Hyun-Jung Kim ◽  
Sung-Kie Youn ◽  
Seung-Hoon Lee ◽  
Deog-Gyu Lee ◽  
...  
Keyword(s):  
Mirror System ◽  
Optical Performance ◽  
Primary Mirror

SOFIA primary mirror assembly: structural properties and optical performance

2003 ◽  
Author(s):  
Hermann Bittner ◽  
Matthias Erdmann ◽  
Peter Haberler ◽  
Karl-Heinz Zuknik
Keyword(s):  
Structural Properties ◽  
Optical Performance ◽  
Primary Mirror

Design and Performance of a Versatile Penn State near IR Imager and Spectrograph

2003 ◽  
Author(s):  
Jian Ge ◽  
Abhijit Chakraborty ◽  
John H. Debes ◽  
Deqing Ren ◽  
Jerry Friedman
Keyword(s):  
Near Ir ◽  
Penn State ◽  
Ir Imager ◽  
And Performance

Application of Interferometry Measurement in Large-Scale Optic-Electrical Theodolite

2013 ◽  
Vol 303-306 ◽  
pp. 335-338
Author(s):  
Nan Zhao ◽  
Zhi Yuan Sun
Keyword(s):  
Optical System ◽  
Large Scale ◽  
Optical Design ◽  
High Accuracy ◽  
Practical Application ◽  
Important Method ◽  
Primary Mirror ◽  
Accuracy Measurement ◽  
Mechanical Structure ◽  
High Accuracy Measurement

Interferometry is a very important method in high accuracy measurement for optical system. This article briefly introduced the conception of interferometry and took a product of 4D Technology as an example to carry on the measurement. A large-scale optic-electrical Theodolite in assemblage was measured, and its primary mirror was 400mm in diameter. With the analysis of the results, some micro adjustments of the mechanical structure proceed, and it made the system perform better. The final results of the whole system is 1.061λ in P-V value and 0.1136λ in RMS value (λ=632.8nm), this meets the demand of optical design and practical application. The result demonstrates that interferometry is a good way to be utilized and optimize in the procedure of assemble.

scholarly journals Effect of Discrete Levels Width Error on the Optical Performance of the Diffractive Binary Lens

2017 ◽  
Vol 2017 ◽  
pp. 1-5
Author(s):  
Manal Alshami ◽  
Mohamed Fawaz Mousselly ◽  
Anas Wabby
Keyword(s):  
Thin Film ◽  
Optical Design ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Optical Performance ◽  
Design Code ◽  
Point Spread ◽  
Fabrication Errors ◽  
Spread Function ◽  
Peak Value

The effects of discrete levels width error developed by thin film deposition on the optical performance of diffractive binary germanium lens with four discrete levels are investigated using nonsequential mode in the optical design code ZEMAX. The thin film deposition technique errors considered are metallic mask fabrication errors. The peak value of the Point Spread Function (PSF) was used as criterion to show the effect of discrete levels width error on the optical performance of the four-level binary germanium lens.

Optical Design of Very Large Four-Mirror Systems

2007 ◽  
Vol 364-366 ◽  
pp. 1231-1236 ◽  
Author(s):  
Li Rong Zhu ◽  
Wei Min Shen
Keyword(s):  
Focal Length ◽  
Optical Design ◽  
Diffraction Limit ◽  
Field Of View ◽  
Initial Structure ◽  
Entrance Pupil ◽  
Primary Mirror ◽  
Imaging Quality ◽  
Large Aperture ◽  
Design Idea

Four-mirror systems with a very large aperture and a long focal length were investigated and designed. Their design idea is given. Through the derivation of primary aberration formula, the aberration properties were analyzed and discussed, and the method to determine its initial structure is reported. As examples, two four-mirror systems with spherical and parabolic primary mirror, 100m focal length, and 10m entrance pupil were optimally designed. Their imaging quality approaches diffraction limit within field of view of 0.4 and 0.5 degrees respectively.

scholarly journals SPHERICAL PRIMARY MIRROR IN TELESCOPES WITH COMPLEX (MULTI-ELEMENT) OPTICAL DESIGNS

2021 ◽  
Vol 34 ◽  
pp. 81-84
Author(s):  
S.V. Podlesnyak ◽  
N.N. Fashchevsky ◽  
Yu.N. Bondarenko ◽  
S.M. Andrievsky
Keyword(s):  
Wave Front ◽  
Focal Plane ◽  
Optical Design ◽  
Effective Field ◽  
Field Of View ◽  
Spherical Mirror ◽  
Primary Mirror ◽  
Reflected Wave ◽  
Aperture Ratio

An optical design for telescope with spherical primary mirror, planoidal surface and two-lens corrector is discussed. The spherical mirror hasn aperture ratio 1/2.69. After reflection from the spherical mirror, the wave front falls on a planoidal surface and “forms” the reflected wave front from a virtual mirror with e 2 = 1.576. After passing the two-lens corrector, the light is collected in the focal plane. A dot diagram in the focal plane shows that all three-order aberrations are successfully corrected. The effective field of view is 2 degrees. The aperture ratio is 1/2.28.

Sign in / Sign up

Export Citation Format

Share Document