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 elengdf
Junior Member
Messages : 10
Inscrit(e) le: 19/03/2020
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 Posté le 19/03/2020 02:51 |  | | Customized Achromatic Lens |
Our achromatic lenses feature minimized spherical aberration and coma at infinite conjugates, yielding minimal focus spot size. Unlike singlet lens, achromatic lenses have constant focal length independent of aperature and operating wavelength and have superior off-axis performance. Ideal for general purpose benchtop prototyping.
Our production capabilities:
Diameter available: 2.5mm to 100mm
Tolerance: +0/-0.01
Surface: 40-20
Flatness: 1-3 fringes
Centering: 3-5 arc mins
Coating: MgF2 AR coating for visible wavelength, such as AR @400-700nm R<0.4%
Diameter5mm
EFL15mm
ROC 112.5mm
ROC 25.3mm
ROC 312.1mm
Thickness 12.7mm
Thickness 22.1mm
MaterialsBK7+SF2
Diameter5mm
EFL10mm
ROC 16.6mm
ROC 24.3mm
ROC 315.4mm
Thickness 12.5mm
Thickness 21.9mm
MaterialsBAK4+SF5
Diameter8mm
EFL10mm
ROC 17.1mm
ROC 25.3mm
ROC 322.7mm
Thickness 14.5mm
Thickness 22.0mm
MaterialsBAF10+SF6
Frequently asked questions:
Ask: We are using an 16mm diameter focal length 26mm lens located 300mm from a 1.9mm sensor. I have a 1 mm aperture between the back focal length and sensor. With the aperture there is too much vignetting, but without it not enough contrast. How could we solve our setup ?
Answer: In this particular case, your problem is not vignetting. It is in fact one of resolution. If you has the necessary resolution, then you would not need to insert an aperture to improve contrast. The reason you gain contrast by inserting the aperture is because you are vignetting. Vignetting often improves contrast in lower-end imaging systems by eliminating the hardest to control rays. The main thing you could do to improve your setup is to use a better lens. An achromatic lens would really improve the resolution in your setup. Another option you could try is to reduce your field of view.Customized Achromatic Lens
website:http://www.optics-factory.com/achromatic-lens/
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