Dr. Christopher J. Morgan Profile

Dr. Christopher J. Morgan

at Moore Nanotechnology Systems

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 | 4 October 2022 Presentation + Paper

Reduction of cycle time during press molding of glass lenses

Dhanooj Bobba, Christopher Morgan

Proceedings Volume 12219, 1221904 (2022) https://doi.org/10.1117/12.2633380

KEYWORDS: Glasses, Lamps, Birefringence, Glass molding, Precision glass molding, Lenses, Infrared radiation, Optical components, Wafer-level optics, Nitrogen

Read Abstract +

Glass press molding of optical lenses is a time-consuming process due to the time to heat and cool the glass material. Cycle times can range from 15 to 30 minutes with over 80% of the cycle time consumed in heating and cooling. The heating process is limited by the heater capacity, while the cooling process is limited by the maximum cooling rate required to achieve the desired minimum residual stress or birefringence. Typically, glass press molding machines utilize radiant heating elements; therefore, the heating power is limited by the exposure of the mold and glass to the heating elements. Also, temperature gradients in the mirror are difficult to control by radiant heating. This paper presents a new glass press molding machine design that utilizes two heating element types with several independently controlled zones, allowing for higher heating capacity and better control of thermal gradients. The cooling rate during gradual cooling is also controlled to a finer tolerance through nitrogen gas cooling combined with the independently controlled heating zones. Glass lenses pressed with the new process exhibit a shorter cycle time and reduced birefringence.

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