Determining the responsivity of microbolometer FPA using variable optical aperture stop

A Novel Design for a Low-Backscatter Optical Aperture

10.21236/ada397735 ◽

2001 ◽

Author(s):

Clarence E. Rash ◽

John C. Mora

Keyword(s):

Optical Aperture ◽

Novel Design

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Multi-wavelength Optical Aperture Synthesis

Publications of the Astronomical Society of Australia ◽

10.1017/s1323358000019299 ◽

1992 ◽

Vol 10 (1) ◽

pp. 71-73 ◽

Cited By ~ 3

Author(s):

R.G. Marson ◽

T.R. Bedding ◽

J.G. Robertson

Keyword(s):

Radio Astronomy ◽

Angular Resolution ◽

Diffraction Limit ◽

Double Star ◽

Aperture Synthesis ◽

Angular Diameter ◽

Optical Aperture ◽

Multi Wavelength ◽

Red Giant ◽

Large Telescopes

AbstractThe technique of aperture synthesis is well developed in radio astronomy. When applied to the optical regime, aperture synthesis allows one to partially overcome the blurring effects of the atmosphere and increase the angular resolution of large telescopes to the diffraction limit. MAPPIT (Masked APerture-Plane Interference Telescope) is a multi-element interferometer which operates at the coude focus of the 3.9 m Anglo-Australian Telescope. This instrument has recently been reconfigured to operate in a dispersed mode so that simultaneous observations in a band of wavelengths are possible. We will discuss this instrument’s new mode and present observations of the double star δ Sco and an angular diameter of the previously unresolved red giant β Gru.

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Imaging

Modern Optics Simplified ◽

10.1093/oso/9780198842859.003.0011 ◽

2019 ◽

pp. 382-434

Author(s):

B. D. Guenther

Keyword(s):

Transfer Function ◽

Modulation Transfer Function ◽

Noise Intensity ◽

Imaging System ◽

Optical Transfer Function ◽

Modulation Transfer ◽

Optical Aperture ◽

System Properties ◽

Incoherent Imaging ◽

Optical Transfer

Treating an imaging system as a linear system and use llinear system properties to d iscuss both coherent and incoherent imaging. Use a one dimensional pin hole camera to study the theory of incoherent imaging. Two different criteria, Rayleigh and Sparrow, are used to define the resolution limits of the camera. From the simple theory define the optical transfer function and the modulation transfer function as appropriate characterizations of complex imaging systems. A review of the human imaging system emphasizes tits idfferences with man made cameras. Coherent imaging is based on Abbe’s theory of microscopy. A simple 4f imaging system can be used to understand how spatial resolution is limited by the optical aperture and by controlling the aperture, we can enhance the edges of an image or remove noise intensity noise on a plane wave. Apodizing the aperture allows astronomers to locate planents orbiting distant stars.

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Geometrical Optics

Modern Optics Simplified ◽

10.1093/oso/9780198842859.003.0006 ◽

2019 ◽

pp. 188-214

Author(s):

B. D. Guenther

Keyword(s):

Coordinate System ◽

Ray Tracing ◽

Geometrical Optics ◽

Paraxial Approximation ◽

Cartesian Coordinate System ◽

Lens System ◽

Thin Lens ◽

Aperture Stop ◽

Sign Convention ◽

Cartesian Coordinate

Discuss the limits imposed by the paraxial approximation. Define the sign convention based on the cartesian coordinate system, the foiundation of analytic geometery. Demonstrate ray tracing technique to derive the ABCD maxtrix which will generate both the gaussian and Newtonian form of the thin lens equation and the lens maker’s equation. The cardinal points of a lens are also derived. The ABCD matrix is used to explore the methods used in ray tracing to locate the aperture stop of a Cooke’s triplet lens system. In the problem set, the student is asked to use the aperture stop to locate the entrance and exit pupil of a Cooke’s triplet.

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