Mitutoyo’s M Plan Apo NIR Series objective lens series correct for chromatic aberration throughout the visible light spectrum and the near infrared region to focus visible through near infrared (NIR) wavelengths onto the same plane for sharpest possible image. All models are optimized for brightfield observations and laser microscopy applications in the visible and NIR spectrum, and the M Plan Apochromat NIR B objective lenses are ideal for use of YAG laser fundamental and second harmonic transmission at 1064nm and 532nm. They all feature an ultra-long working distance optics, anti-reflective coatings and enhanced functions to increase transmissivity in the near infrared region. The workpiece image can be focused within the focal depth whenever the wavelength is from the visible range (λ= 480nm) (NIR Bmodels λ=420nm) up to near-infrared range (λ=1800nm)(NIR B λ=1064nm), making these objectives ideal for laser repair applications. However, when the wavelength used exceeds 1100nm, the focusing position may deviate slightly from the position in the visible range due to changes in glass dispersion and refractive index.
Typical Optical System for Laser Processing:
Chromatic Aberration
Model | SKU Number | N.A. | W.D. (mm) | f(mm) (λ= 550 nm) | R(µm) (λ= 550 nm) | ±DOF (µm) | Real FOV, ø24 Eyepiece (mm) | Real FOV, 1/2" Camera (mm) | Mass (g) |
M Plan Apo NIR 5X | MTYO 378-822-5 | 0.14 | 37.5 | 40 | 2 | 14 | 4.8 | 0.96×1.28 | 220 |
M Plan Apo NIR 10X | MTYO 378-823-5 | 0.26 | 30.5 | 20 | 1.1 | 4.1 | 2.4 | 0.48×0.64 | 250 |
M Plan Apo NIR 20X | MTYO 378-824-5 | 0.4 | 20 | 10 | 0.7 | 1.7 | 1.2 | 0.24×0.32 | 300 |
M Plan Apo NIR 50X | MTYO 378-825-5 | 0.42 | 17 | 4 | 0.7 | 1.6 | 0.48 | 0.10×0.13 | 315 |
M Plan Apo NIR 100X | MTYO 378-826-15 | 0.5 | 12 | 2 | 0.6 | 1.1 | 0.24 | 0.05×0.06 | 335 |
M Plan Apo NIR HR 50X | MTYO 378-863-5 | 0.65 | 10 | 4 | 0.4 | 0.7 | 0.48 | 0.10×0.13 | 450 |
M Plan Apo NIR HR 100X | MTYO 378-864-5 | 0.7 | 10 | 2 | 0.4 | 0.6 | 0.24 | 0.05×0.06 | 450 |
M Plan Apo NIR B 20X | MTYO 378-867-5 | 0.4 | 25.5 | 10 | 0.7 | 1.7 | 1.2 | 0.24×0.32 | 350 |
M Plan Apo NIR B 50X | MTYO 378-868-5 | 0.42 | 25.5 | 4 | 0.7 | 1.6 | 0.48 | 0.10×0.13 | 375 |
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