378-868-5 M Plan Apo NIR B 50X Objective for bright-field observation in near-infrared range, WD: 25.5mm

50x

420-1064 nm

4 mm

0.7 µm

ø0.48 mm

N.A.: Numerical aperture
W.D.: Working distance
P.D.: Parfocal distance
f: Focal distance
R: Resolving power
D.F.: Depth of field
FOV 1: Field of view when using ø24 mm eyepiece
FOV 2: Field of view when using a digital camera with 1/2" chip size

Note:
These objective lenses are designed so that the image of a workpiece remains focused within the focal depth even when the wavelength used is changed from within the visible range up to the near-infrared (480 to 1,800 nm).
Therefore the M Plan NIR Series are suitable for laser repair. However, when the wavelength used exceeds 1,100 nm, the focussing position may deviate slightly from that in the visible range due to changes in glass dispersion and refractive index.