Variable sheet:
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St Input Name Output Unit Comment
1 m order (unitless)
400 lambda nm wavelength (mm, µm, nm, A)
d .00083333 mm grating constant (cm, mm, µm)
theta 14.386773 degrees rotation angle of grating (radians, degrees)
15 Phi degrees monochromator takeoff angle (radians, degrees)
alpha -.6132267 degrees incidence angle (radians, degrees)
beta 29.386773 degrees diffraction angle (radians, degrees)
1200 lines lines/mm grating ruling density (lines/mm)
AngDisp .00137721 nm-1 Angular dispersion (mm-1, nm-1)
LinDisp .03443024 mm/A Linear Dispersion (mm/nm, mm/A)
RLD 2.9044237 nm/mm Reciprocal linear dispersion (nm/mm, A/mm)
25 f cm Focal length (mm, cm, m)
Sg .07261059 nm Geometrical spectral bandpass (mm, µm, nm, A)
S .08138252 nm Spectral bandpass (mm, µm, nm, A)
.5 H cm Slit height (cm, mm, µm)
25 W µm Slit width (cm, mm, µm)
Sd .00877193 nm diffraction limited resolution (mm, µm, nm, A)
N 45600 Total number of lines in grating (unitless)
38 Wg mm aperture (mm, cm, m)
R 52333.962 Resolving power (unitless)
FSR 200 nm Free spectral range (mm, µm, nm, A)
omega .02310268 sr acceptance solid angle, steradians )sr)
Fnumber 5.8306073 F-number of monochromator (unitless)
Ap 14.439173 cm2 grating area viewed from entrance slit (cm2)
As .00125 cm2 Slit area (cm2, mm2)
PhiO .00209687 µwatts Radiant power passed by monochromator
.002 Blambda W/sr/nm/c Source spectral radiance (W/sr/nm/cm2)
.5 Top Transmission factor of monochromator
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Rule sheet.
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* d=1/lines
* AngDisp = m/(d*cos(beta))
* LinDisp = f*AngDisp
* RLD=1/LinDisp
* Sg=W/LinDisp
* S = Sg+Sd
* Sd = lambda/(m*N)
* N = Wg/d
* R = m*N/cos(beta)
* theta=beta-Phi
* alpha=theta-Phi
* m*lambda=2*d*cos(Phi)*sin(theta)
* FSR=lambda/(m+1)
* omega=Ap/f^2
* Ap=Wg^2*cos(alpha)
* As=0.01*W*H
* PhiO=Blambda*As*omega*Top*Sg*1e6
* Fnumber=f/sqrt(4*Ap/pi())
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