Mr. James R. Bogan Profile

James R. Bogan

Engineer

SPIE Involvement:

Author

Publications (1)

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 | 1 November 1997 Paper

Interferometric testing of cylinder optics using a computer-generated hologram (CGH)

Patrick Tam, Kenneth Gross, James Bogan

Proceedings Volume 3134, (1997) https://doi.org/10.1117/12.295154

KEYWORDS: Mirrors, Computer generated holography, Interferometry, Optical testing, Photovoltaics, Error analysis, Collimation, Wavefronts, Gemini Planet Imager, Interferometers

Read Abstract +

In this paper we describe an interferometric technique for testing uniformity in surface figure of large cylinder optics. In our laser scanning system, we employ large (1 1 inch) cylinder mirrors for focusing of laser beams over a wide scan range. Performance of the system depends critically on the uniformity of the beam size on the focal plane over this scan range. Departure of portions of the surface figure from the ideal cylindrical surface lead to varying beam size that limit the performance of our systems. Initially we tested these mirrors with a metrology technique that sample beam size on the focal plane at various scan positions. This technique is both time consuming and unreliable. To circumvent these limitations, we developed a fast interferometric technique to qualify these mirrors using a computer generated hologram (CGH) as our reference cylinder optics. The methodology employed simulates the scanning process by subdividing the interferogram of the cylinder mirror into small sections that are of the order of the beam size, analyzing the surface figure over these subsections and then computing a figure of merit (FOM) that is tied to the uniformity of the surface figure over the entire mirror. The correlation between the two independent measurements is found to be very good. In the following we discuss briefly the methodology developed in the Zygo platform, which can be easily implemented as an automated QA procedure.

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