Optical Calculators
Fill in Variables by Directly Editing Equation
Gaussian Beam Calculator (ss in μm at the 1/e² power points)
ss =
4 · ·
π ·
Notes:
(1) f: focal length of lens
(2) D: gaussian beam dia at 1/e² pwr pts
(3) λ: wavelength of light in units of μm
(4) f & D must be in the same units
Rayleigh Length of a Gaussian Beam
Zr =
π · ²
Notes:
(1) w₀: begining beam waist or semi-diameter
(2) λ: wavelength of light in units of μm
(3) all values must be in mm
Airy Disc Calculator (ss in μm at the first null points)
ss =
1.22 · ·
Notes:
(1) f: focal length of lens
(2) D: Airy disc dia at first null points
(3) λ: wavelength of light in units of μm
(4) f & D must be in the same units
Collimating Lens Clear Aperture (CA in units of lens focal length f)
CA =
2 · ·
Notes:
(1) na: numerical aperture of fiber
(2) f: focal length of lens
½ Field Of View (½FOV in milliradians)
½ FOV =
1000 ·
2 ·
Notes:
(1) D: diameter of fiber
(2) f: focal length of lens
(3) D & f must be in the same units