Dr. Andy Whitehead Profile

Dr. Andy Whitehead

at Southern Vision Systems Inc

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 27 October 2003 Paper

Optical correlator system design using optomechanical constraint equations to determine system sensitivities

Paul Burke, Arthur Caneer, Andy Whitehead, Alson Hatheway

Proceedings Volume 5176, (2003) https://doi.org/10.1117/12.507542

KEYWORDS: Optical correlators, Image filtering, Tolerancing, Lenses, Mirrors, Optical filters, Optical alignment, Optical design, Adaptive optics, Aluminum

Read Abstract +

Finding the components of an optical system that are most sensitive to misalignment allows a designer to insulate them from outside perturbations or incorporate compensators to account for alignment errors. At Advanced Optical Systems, Inc. (AOS) we used opto-mechanical constraint (OMC) equations to analyze the misalignment sensitivity of an optical correlator system and develop a better design. The OMC equations provide sensitivity coefficients for each element in the design that can be used to determine which components create the greatest image shift and focus errors when not optimally aligned. The OMC analysis model of the optical correlator was verified using a test bench with lenses in adjustable mounts to induce known amounts of misalignment in multiple axes. The experimental data matched the calculated values for each tested lens. The OMC coefficients assisted in identifying (1) lenses that are sensitive to loose manufacturing tolerances, (2) where subsystem designs can be beneficial, and (3) materials that provide optimum thermal performance. We will show results from our latest optical correlator package built using the OMC model analysis, which was critical to making decisions in the opto-mechanical design state of system development. We will also discuss a MATLAB simulation of AOS' optical correlator that incorporates the opto-mechanical constraints into a digital simulation of the correlation image.

Proceedings Article | 21 August 2003 Paper

Autonomous rendezvous and docking sensor suite

Elizabeth Tanner, Stephen Granade, Charles Whitehead

Proceedings Volume 5086, (2003) https://doi.org/10.1117/12.487345

KEYWORDS: Sensors, Retroreflectors, Imaging systems, Space operations, Reflectors, Target detection, Prototyping, Adaptive optics, Signal detection, Optical filters

Read Abstract +

Advanced Optical Systems, Inc. is developing the Autonomous Rendezvous and Docking Sensor Suite for Marshall Space Flight Center to provide real-time range and 6 Degree Of Freedom (DOF) information. This information facilitates the autonomous docking of two spacecraft. The sensor suite is comprised of the Advanced Video Guidance Sensor (AVGS) and the Wide Angle Laser Range Finder (WALRF). AVGS was developed under NASA's Demonstration of Autonomous Rendezvous Technology (DART) program for a cooperative target and is scheduled to fly in 2004. The prototype of the WALRF is being developed at AOS under a different program. The sensor suite can provide range and bearing data up to 5km and 6 DOF information up to 300m for the DART target configuration. Different target geometries can increase range detection and 6 DOF detection distance. The sensor suite is a laser-based optical system with a combined weight of less than 40lbs and a combined volume of less than 12”×10”×18”. The WALRF system employs a bistatic transceiver with an 8° field of view (FOV). This sensor is a time-of-flight range finder with a quad detector. The AVGS section of the suite is a monostatic transceiver with a 16° FOV and high-speed imager. This section of the suite uses a pattern recognition system that reduces imager data into 6 DOF information. In this paper we will outline in detail the AVGS and WLRF functionality as well as experimental range data and measurement accuracy.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years