Detailed Description of the Notation

Download Silicon Elements for IR Objective Lens Datasheet (PDF, 144 KB)

Part 1. Regular errors

D, Lx, Ly, C Parameters of reference surface
D – sag of the sphere at the edge of pupil (D=0 for plane reference surface)
Lx, Ly – tilt of sphere
C – constant
RMS(w) RMS of wavefront with regard to reference surface
A, FIA value and angle of turn of astigmatism
RMS(w-a) RMS of wavefront beyond astigmatism
FA statistic estimation of the contribution of astigmatism to the complete wavefront distortion
B0,B2,B4,... coefficients of zonal error at corresponding power P
( p*p = x*x + y*y ) or at Zernike polynomial
RZ span of zonal error
RMS(w-z) RMS of wavefront except zonal error
FZ statistic estimation of the contribution of zonal error to the complete wavefront distortion
C, FIC value and angle of turn of coma error
RMS(w-c) RMS of wavefront except coma
FC statistic estimation of the contribution of coma error to the complete wavefront distortion

Part 2. Local errors (errors of wavefront with power higher than 4th)

R span of local errors
RMS(M) RMS of local errors

Part 3. Parameters of surface under control

RMS RMS of surface error (RMS = RMS(w) )
MIN minimal value of surface (valley)
MAX maximal value of surface (peak)
R span (PtV)
STRL lower bound of Schtrel number
STRM upper bound of Schtrel number
X, Y test area coordinates