A novel CNC aspheric grinding machine

Jianjun Hu; Junhua Pan

doi:10.1117/12.666945

9 December 2005 A novel CNC aspheric grinding machine

Jianjun Hu, Junhua Pan

Proceedings Volume 6024, ICO20: Optical Devices and Instruments; 602421 (2005) https://doi.org/10.1117/12.666945
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

Aspheric surface can be thought as being enveloped by a series of spherical surfaces with their centres on the same axis but having different positions. These spherical surfaces are tangent with the aspheric surface. We have manufactured a Φ600 CNC aspheric grinding machine with this novel operating principle. We choose δp , ε and αp as the key parameters of our grinding machine. δp is the distance between the cup-shaped tools' bottom and the vertex of the aspheric surface. αp is the rotational angle of the cup-shaped tool. ε is the space angle of the cup-shaped tool during the fabrication process of convex aspheric surface. Using this grinding machine, we can fabricate a conic concave aspheric surface continuously about three hours. But we need change the cup-shaped tool one time when we fabricate a conic convex aspheric surface in also about three hours. Our grinding machine can also be used to fabricate high-order aspheric surface. We used this machine fabricating a RC telescope system's primary and the secondary mirror. The PV-value is less than 5μm for the primary Φ350 concave hyperbolic aspheric surface which departure is about 55μm. We can polish and finish this aspheric surface with these residual errors easily. The manufacturing cost of the machine is about 300,000 RMB which is 1/10 of the LOH's product with the same maximum aperture of workpiece.

Citation Download Citation

Jianjun Hu and Junhua Pan "A novel CNC aspheric grinding machine", Proc. SPIE 6024, ICO20: Optical Devices and Instruments, 602421 (9 December 2005); https://doi.org/10.1117/12.666945

ACCESS THE FULL ARTICLE

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: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Aspheric lenses

Lens grinding equipment

Optical spheres

Surface finishing

Manufacturing

Spherical lenses

Mirrors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years