1. VSR FTIR ZnSe Lens
Analysis Results

2. ZnSe Lens Optical Parameters
8.5 µm mm
Image Space semi-FOV from LR Tech raytrace ±2 degrees
Object Height for 2 degree semi-FOV in Image Space 6.90 mm
Object Space Numerical Aperture
Object Space F/5.5
Exit Pupil Diameter mm
Wavelength Range 3 to 13.8 microns
Abbe Number of ZnSe 23.66

3. ZnSe Lens Focal Length versus Wavelength
λ µm
13.8
10.2
8.5
7.6
5.5
4.1 3
EFL
202.07
198.13
196.78
196.18
195.00
194.31
193.67
ΔEFL
5.29
1.34
0.00
-0.60
-1.78
-2.47
-3.12

11. ZnSe Lens Prescription Text File

12. VSR FTIR Apochromat Lens
Analysis Results

13. Apochromat Lens Optical Parameters
8.5 µm mm
Image Space semi-FOV from LR Tech raytrace ±2 degrees
Object Height for 2 degree semi-FOV in Image Space mm
Object Space Numerical Aperture
Object Space F/5.5
Exit Pupil Diameter mm
Materials: NaCl, CsBr, CdSe
Equivalent Abbe Number

21. Apochromat Lens Prescription Text File

22. Apochromat & ZnSe Singlet Comparison