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GrismEps
-
The angle between the normal and the dispersion plane
- Description:
- This attribute holds the angle (in radians) between the normal to
the grating or exit prism face, and the dispersion plane. The
dispersion plane is the plane spanned by the incoming and outgoing
ray. The default value is 0.0.
- Type:
- Double precision.
- Class Applicability:
-
GrismMap
-
All GrismMaps have this attribute.
Next: GrismG - The grating ruling density
Up: AST Attribute Descriptions
Previous: GrismAlpha - The angle of incidence of the incoming light on the grating surface
AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 210
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk
Copyright (C) 2009 Science \& Technology Facilities Council