FOS Dispersion Model Physical Principle
Relevant FOS Optical Layout High Res Mode
- wheel holds 5 different 1st order spherical gratings on wheel
- image on red and blue sensitive Digicons (E??B amplifiers onto diodes)
Physical Principles
- ray optics equation from grating to photocathode
- z - z0 = (f - f0 )* [ a + ß + arcsin { s / m * ? - sin ( a - ß ) } ]
- S-distortion in Digicon tube (off-axis aberration in ExB geometry)
- x - x0 = g * z + h * tan ( i + j * z)
Notes
- common to all gratings on a given channel: z0 , x0 , g , h , i , j, f0
- common to the red and blue channel per grating: f , (a - ß), [s / m * ?]