Note: Focal length and focal depth for objectives are specified at a reference wavelength of 0.55 µm irrespective of working wavelength.
These objectives are designed so that a workpiece's image remains substantially in focus even when the wavelength used is changed anywhere from the visible range (λ = 620 nm) to the near-ultraviolet range (λ = 355 nm). Therefore the M Plan APO NUV Series is suitable for laser repair applications.
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M Plan Apo NUV | M Plan Apo NUV HR | |||
---|---|---|---|---|
MIT-378-809-5 | MIT-378-817-8 | MIT-378-819-4 | MIT-378-888-6 | |
Magnification | 10X | 20X | 100X | 50X |
Numerical Aperture | 0.28 | 0.40 | 0.50 | 0.65 |
Working Distance (mm) | 30.5 | 17 | 11 | 10 |
Focal Length (mm) | 20 | 10 | 2 | 4 |
Resolving Power (µm) | 1.0 | 0.7 | 0.6 | 0.42 |
Focal Depth (µm) | 3.5 | 1.7 | 1.1 | 0.65 |
View Field 1*1 (mm) | ø2.4 | ø1.2 | ø0.24 | ø0.48 |
View Field 2*2 (mm) | 0.48 x 0.64 | 0.24 x 0.32 | 0.05 x 0.06 | 0.10 x 0.13 |
Mass (g) | 255 | 340 | 380 | 500 |
*¹Field of view when using a field number 24 mm eyepiece.
*²Field of view when using 1/2" CCD camera.