Mr. Michael Hunter Profile

Michael Hunter

Director at Chardon Tool

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 | 10 July 2018 Paper

Machining of ZnSe grisms for the Rapid Infrared Imager Spectrograph (RIMAS): effect of diamond crystal orientation

Paul Kuzmenko, Steve Little, Alexander Kutyrev, Michael Hunter

Proceedings Volume 10706, 1070659 (2018) https://doi.org/10.1117/12.2313020

KEYWORDS: Diamond, Diffraction, Surface finishing, Diamond machining, Crystals, Inspection, Infrared radiation

Read Abstract +

The Rapid Infrared Imager/Spectrograph (RIMAS) is an instrument designed to observe gamma ray burst afterglows. Dispersion in the moderate resolution mode (R~4000) is provided by ZnSe grisms: one covering the Y and J bands and the other covering the H and K. Each has a clear aperture of 44 mm. For the HK grism the blaze is 49.9° with a 20 line/mm period. The grooves cover an area of 69 mm x 45 mm.

The HK grism was diamond machined on the Precision Engineering Research Lathe (PERL) at LLNL. Chipping of the grooves increased from moderate to severe as the cutting progressed resulting in excess scattered light and reduced diffraction efficiency. High magnification optical microscopy and SEM of the cutting edges indicated damage to the tool caused by wear.

A comparison of the outcomes of ZnSe gratings and grisms machined at LLNL indicated that chipping was minimal in low blaze angle cuts but moderate to severe with the blaze angle near 45° as in the HK grism. Vendor records showed that the (100) crystal planes of the diamond were aligned parallel to the tool shank. Therefore the (100) planes are closely aligned with the cutting edge in low blaze angle tools but 45° off in the HK tool. We believe that this misalignment of the cutting edge with the (100) crystal plane in the HK tool produced excessive tool wear resulting in the chipped grooves observed.

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