Dr. Anees Ahmad Profile

Dr. Anees Ahmad

Sr. Principal Systems Engineer at Raytheon

SPIE Involvement:

Author

Area of Expertise:

Optical engineering , EO systems engineering , Project management , Optomechanical engineering , EO seekers , Value engineering

Publications (33)

Proceedings Article | 30 August 2019 Paper

System engineering of complex optical systems: requirements and verification documents

Anees Ahmad

Proceedings Volume 11100, 111000E (2019) https://doi.org/10.1117/12.2533817

KEYWORDS: Systems engineering, Reliability, Safety, Inspection, Sensors, Signal to noise ratio, Manufacturing, Defense and security

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Proceedings Article | 23 August 2017 Paper

System engineering of complex optical systems for mission assurance and affordability

Anees Ahmad

Proceedings Volume 10371, 1037109 (2017) https://doi.org/10.1117/12.2271667

KEYWORDS: Reliability, Systems engineering, Optical design, Missiles, Defense and security

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Proceedings Article | 17 September 2007 Paper

Shroud debris modeling techniques for IR sensors in space

Anton VanderWyst, David Jenkins, Anees Ahmad

Proceedings Volume 6665, 66650R (2007) https://doi.org/10.1117/12.740166

KEYWORDS: Particles, Sensors, Atmospheric particles, Infrared sensors, Mirrors, Atmospheric optics, Sensor performance, Space sensors, Atmospheric modeling, Contamination

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Proceedings Article | 9 September 2002 Paper

Risk mitigation process for utilization of commercial off-the-shelf (COTS) parts in CCD camera for military applications

Anees Ahmad, Scott Batcheldor, Steven Cannon, Thomas Roberts

Proceedings Volume 4771, (2002) https://doi.org/10.1117/12.482159

KEYWORDS: Commercial off the shelf technology, Cameras, Charge-coupled devices, CCD cameras, Defense technologies, Electromagnetic coupling, Temperature metrology, Electronic components, Missiles, Imaging systems

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Proceedings Article | 5 November 2001 Paper

Structural and thermal modeling of a cooled CCD camera

Anees Ahmad, Thomas Arndt, Robert Gross, Mark Hahn, Mark Panasiti

Proceedings Volume 4444, (2001) https://doi.org/10.1117/12.447294

KEYWORDS: Charge-coupled devices, CCD cameras, Cameras, Lead, Thermal modeling, Signal to noise ratio, Cooling systems, Finite element methods, Electronics, Copper

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Proceedings Article | 24 October 2000 Paper

Optomechanical design of a low-cost CCD-based camera

Anees Ahmad, Thomas Arndt, Rick Bomber, Rene Perez, Hector Rodriguez, Mark Panasiti

Proceedings Volume 4093, (2000) https://doi.org/10.1117/12.405198

KEYWORDS: Cameras, CCD cameras, Charge-coupled devices, Electronics, Optomechanical design, Lens design, Modulation transfer functions, Signal to noise ratio, Temperature metrology, Tolerancing

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Proceedings Article | 28 September 1999 Paper

Design of a lightweight telescope with highly stable line of sight

Anees Ahmad, Robert Wright, Todd Baker

Proceedings Volume 3786, (1999) https://doi.org/10.1117/12.363810

KEYWORDS: Mirrors, Telescopes, Beryllium, Tolerancing, Optical instrument design, Off axis mirrors, Surface finishing, Diamond turning, Diamond, Mirror structures

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Proceedings Article | 29 October 1998 Paper

Low-distortion mounting techniques for metal mirrors

Anees Ahmad

Proceedings Volume 3429, (1998) https://doi.org/10.1117/12.328526

KEYWORDS: Mirrors, Interfaces, Distortion, Mirror mounts, Optical mounts, Metals, Mirror structures, Optics manufacturing, Diamond, Optical components

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Proceedings Article | 1 November 1997 Paper

Automated MTF analyzer for spectacle lenses

Jonathan Drewes, Russell Chipman, James Hadaway, Anees Ahmad

Proceedings Volume 3134, (1997) https://doi.org/10.1117/12.295124

KEYWORDS: Modulation transfer functions, Zoom lenses, Monochromatic aberrations, Lenses, Eyeglasses, Image quality, Point spread functions, Charge-coupled devices, Eye models, Eye

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Proceedings Article | 13 October 1997 Paper

Design and fabrication of low-cost adjustable lens mounts

Anees Ahmad

Proceedings Volume 3132, (1997) https://doi.org/10.1117/12.284082

KEYWORDS: Optical fabrication, Relays, Optical alignment, Lens design, Aluminum, Optical testing, Scanners, Mirrors, Optomechanical design, Collimation

Proceedings Article | 26 September 1997 Paper

Final design, assembly, and testing of a space-based total integrated scatter instrument

James Hadaway, Anees Ahmad, Jean Bennett

Proceedings Volume 3141, (1997) https://doi.org/10.1117/12.287796

KEYWORDS: Sensors, Mirrors, Contamination, Calibration, Aerospace engineering, Reflectivity, Environmental monitoring, Scatter measurement, Optical spheres, Optical properties

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Proceedings Article | 25 September 1997 Paper

Knowledge-based expert system for optomechanical design

Anees Ahmad

Proceedings Volume 3130, (1997) https://doi.org/10.1117/12.284050

KEYWORDS: Optical mounts, Optomechanical design, Optical design, Prototyping, Databases, Optical alignment, Distortion, Visualization, Mirror mounts, Mirrors

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Proceedings Article | 21 November 1996 Paper

Design and fabrication of a compact lidar telescope

Anees Ahmad, Farzin Amzajerdian, Chen Feng, Ye Li

Proceedings Volume 2832, (1996) https://doi.org/10.1117/12.258884

KEYWORDS: Mirrors, Space telescopes, Telescopes, LIDAR, Diamond machining, Optical instrument design, Optical design, Wavefronts, Diamond, Tolerancing

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Proceedings Article | 13 November 1996 Paper

Design and modeling of a low-f-number wide-field-of-view imaging spectrometer

Chen Feng, Anees Ahmad

Proceedings Volume 2819, (1996) https://doi.org/10.1117/12.258059

KEYWORDS: Spectroscopy, Lens design, Tolerancing, Airglow, Charge-coupled devices, Optical design, CCD image sensors, Sensors, Telescopes, Collimators

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Proceedings Article | 1 November 1996 Paper

Design of an in-vivo microscope to characterize cataracts in human eyes

Chen Feng, Anees Ahmad

Proceedings Volume 2863, (1996) https://doi.org/10.1117/12.256224

KEYWORDS: Microscopes, Eye, Objectives, Cornea, In vivo imaging, Tissues, Image quality, CCD cameras, Cameras, Optical design

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Proceedings Article | 19 July 1996 Paper

Performance modeling of grazing incidence optics with structural deformations and fabrication errors

David Zissa, Anees Ahmad, Chen Feng

Proceedings Volume 2805, (1996) https://doi.org/10.1117/12.245105

KEYWORDS: Mirrors, X-rays, X-ray imaging, Ray tracing, X-ray optics, Error analysis, Scattering, Optical fabrication, Systems modeling, Optical alignment

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SPIE Journal Paper | 1 November 1995

Design and modeling of a compact imaging spectrometer

Chen Feng, Anees Ahmad

OE, Vol. 34, Issue 11, (November 1995) https://doi.org/10.1117/12.10.1117/12.213653

KEYWORDS: Spectroscopy, Mirrors, Telescopes, Imaging systems, Aspheric lenses, Spectrometer engineering, Sensors, Collimators, Image quality, Spectral resolution

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Proceedings Article | 13 October 1995 Open Access

New practical MS/MSE degree program with concentration in optics and photonics technology

John Dimmock, Anees Ahmad, Stephen Kowel

Proceedings Volume 2525, (1995) https://doi.org/10.1117/12.224029

KEYWORDS: Optics manufacturing, Photonics, Physics, Computer aided design, Manufacturing, Design for manufacturability, Product engineering, Quantum optics, Missiles, Optical design

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Proceedings Article | 15 September 1995 Paper

Design and analysis of a spaceborne lidar telescope

Chen Feng, Anees Ahmad, Farzin Amzajerdian

Proceedings Volume 2540, (1995) https://doi.org/10.1117/12.219534

KEYWORDS: Space telescopes, Telescopes, LIDAR, Mirrors, Scanners, Optical design, Optical instrument design, Wavefronts, Sensors, Polarization

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Proceedings Article | 6 September 1995 Paper

Design and fabrication of low-cost x-ray mirrors

Anees Ahmad, Darell Engelhaupt, Chen Feng, Ye Li

Proceedings Volume 2542, (1995) https://doi.org/10.1117/12.218654

KEYWORDS: Mirrors, Nickel, X-rays, Surface finishing, Plating, Aluminum, Polishing, X-ray optics, Gold, Space telescopes

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Proceedings Article | 11 August 1995 Paper

Virtual prototyping: a cost-effective emerging methodology

Anees Ahmad, Chen Feng, RamaGopal Sarepaka

Proceedings Volume 2537, (1995) https://doi.org/10.1117/12.216399

KEYWORDS: Computer aided design, Optical design, Prototyping, Tolerancing, Optical components, Mechanical engineering, Interfaces, Systems modeling, Optomechanical design, Finite element methods

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Proceedings Article | 2 June 1995 Paper

Software to model the performance of x-ray telescopes

David Zissa, Anees Ahmad, Chen Feng

Proceedings Volume 2478, (1995) https://doi.org/10.1117/12.210926

KEYWORDS: X-rays, Mirrors, Scattering, Sensors, X-ray telescopes, Convolution, X-ray sources, X-ray imaging, Systems modeling, Point spread functions

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Proceedings Article | 22 May 1995 Paper

High field-of-view IR scanner using microlens arrays

Chen Feng, Anees Ahmad, RamaGopal Sarepaka

Proceedings Volume 2470, (1995) https://doi.org/10.1117/12.210053

KEYWORDS: Microlens array, Scanners, Infrared imaging, Thermography, Beam steering, Vignetting, Imaging systems, Thermal effects, Microlens, Micro optics

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Proceedings Article | 19 April 1995 Paper

Interactive simulation-based optical system development

Anees Ahmad, Chen Feng, RamaGopal Sarepaka

Proceedings Volume 10280, 102800H (1995) https://doi.org/10.1117/12.204223

KEYWORDS: Optical simulations, Optical systems engineering, Solid modeling, Computer simulations, Prototyping, Ray tracing, Error analysis, Thermography, Optomechanical design, Thermal analysis

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Proceedings Article | 28 March 1995 Paper

Scanning telescope for the advanced polarized infrared imaging sensor (APIRIS)

Chen Feng, Anees Ahmad, Ye Li, RamaGopal Sarepaka

Proceedings Volume 2473, (1995) https://doi.org/10.1117/12.204873

KEYWORDS: Mirrors, Telescopes, Space telescopes, Optical instrument design, Tolerancing, Scanners, Lenses, Sensors, Infrared imaging, Germanium

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SPIE Journal Paper | 1 February 1995

Tolerance analysis versus image quality: a case study for cost-effective space optics

Anees Ahmad, Chen Feng, RamaGopal Sarepaka

OE, Vol. 34, Issue 02, (February 1995) https://doi.org/10.1117/12.10.1117/12.194038

KEYWORDS: Tolerancing, Mirrors, Ultraviolet radiation, Imaging systems, Image quality, Space telescopes, Phase modulation, Astronomical imaging, Telescopes, Optical fabrication

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Proceedings Article | 17 October 1994 Paper

Material selection for lightweight optical components in fieldable military optical test set

Darell Engelhaupt, Anees Ahmad, George Lewis, Gene George

Proceedings Volume 2269, (1994) https://doi.org/10.1117/12.188651

KEYWORDS: Silicon, Aluminum, Silicon carbide, Heat treatments, Iron, Optical components, Copper, Optics manufacturing, Beryllium, Infrared technology

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Proceedings Article | 30 September 1994 Paper

Miniaturized high-resolution NUV-VIS-NIR imaging spectrometer array for FAST SAT applications

Douglas Torr, Muamer Zukic, Chen Feng, Anees Ahmad, Wesley Swift

Proceedings Volume 2266, (1994) https://doi.org/10.1117/12.187557

KEYWORDS: Mesosphere, Ozone, Spectroscopy, Imaging arrays, Oxygen, Mirrors, Distortion, Spectrographs, Stratosphere, Atmospheric chemistry

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We report the design of a miniature imaging spectrometer array (ISA) for observations of the daytime and nighttime mesosphere, capable of operating in a spectral range extending from the near-ultraviolet (NUV) to the near-infrared (NIR) -- 260 to 870 nm. The instrument comprises an array of f/2 all-reflective imaging spectrometers with a 6 degree(s) field of view. The design comprises an offset single aspheric toroidal telescope mirror, a slit, an offset aspheric toroidal collimator, a plane reflective grating and a camera with three offset decentered aspheric mirrors. The optical system has a 75 mm effective focal length and approximately 7.5 micrometers spot size. The slit image curvature distortion for the system is less than 7.5 micrometers . Sampling of the image plane is provided by a 1317 X 1035 spatial x spectral pixel CCD array with 6.8 micrometers X 6.8 micrometers pixel size. Three modules of the array cover the wavelength range 260 to 400 and 550 to 870 nm at 0.3 nm spectral resolution. One high resolution module covers the range 306 to 310 at 0.05 nm resolution. This channel is used for the measurement of the hydroxyl radical. The sensitivity in the mid visible is approximately 0.1 counts/R-s/spatial bin, dropping to approximately 0.05 count/R-s/bin in the NUV. The readout electronics software allows the 1317 spatial pixels to be summed into any number of selectable bin sizes incurring a single read per bin. Since much of the full slit sensitivity is attributable to the large (6 degree(s)) field of view, the slit could be slanted with respect to the vertical, in order to enhance the sensitivity per vertical spatial bin, at the cost of some horizontal smearing. The instrument offers a powerful means for conducting comprehensive spectroscopic studies of the lower thermosphere and mesosphere, since the overall performance is better than that of the Imaging Spectrometric Observatory (ISO) flown on the ATLAS 1 shuttle mission in 1992. The weight and size reduction from the ISO to the ISA are approximately 270 kg to < 15 kg, and 20 cubic feet to 1 cubic foot respectively. The instrument has been designed specifically to address the issue of quantifying the chemical reactions which result in the natural destruction of ozone in the upper atmosphere. Expected measurements include the concentrations of O, OH, O₃ O₂, N₂, and the neutral temperature between 50 and 110 km. Concentrations H and HO₂ are indirectly determined from the data. The design meets NASA Administrator Daniel Goldin's challenge to build better, cheaper, smaller instruments for fast turn around small satellite missions.

Proceedings Article | 30 September 1994 Paper

Tolerance analysis versus image quality: a case study for cost-effective space optics

Anees Ahmad, Chen Feng, RamaGopal Sarepaka

Proceedings Volume 2263, (1994) https://doi.org/10.1117/12.188022

KEYWORDS: Tolerancing, Mirrors, Image quality, Astronomical imaging, Space telescopes, Imaging systems, Ultraviolet radiation, Telescopes, Optical alignment, Optical instrument design

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SPIE Journal Paper | 1 June 1994

Low-cost adjustable mirror mount

Anees Ahmad

OE, Vol. 33, Issue 06, (June 1994) https://doi.org/10.1117/12.10.1117/12.169725

KEYWORDS: Mirror mounts, Mirrors, Diamond machining, Aluminum, Metals, Optical alignment, Rapid manufacturing, Spherical lenses, Optical mounts, Prototyping

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Proceedings Article | 28 December 1992 Paper

Adjustment mechanisms: types and their applications in optical systems

Anees Ahmad

Proceedings Volume 10265, 102650C (1992) https://doi.org/10.1117/12.61109

KEYWORDS: Optics manufacturing, Optical components, Tolerancing, Optical alignment, Assembly tolerances, Actuators

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Proceedings Article | 1 November 1991 Paper

Lightweight SXA metal matrix composite collimator

R. Barry Johnson, Anees Ahmad, James Hadaway, Alan Geiger

Proceedings Volume 1535, (1991) https://doi.org/10.1117/12.48310

KEYWORDS: Collimators, Mirrors, Nickel, Aluminum, Composites, Silicon carbide, Foam, Beryllium, Metals, Mirror structures

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Proceedings Article | 1 November 1990 Paper

Fabrication techniques for high-resolution lens assemblies

Anees Ahmad

Proceedings Volume 1335, (1990) https://doi.org/10.1117/12.22883

KEYWORDS: Assembly tolerances, Tolerancing, Diamond, Fabrication, Heat treatments, Diamond machining, Epoxies, Aluminum, Quenching (fluorescence), Temperature metrology

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