Mitutoyo 378-825-17 M PLAN APO NIR 50X Objective for bright-field observation in near-infrared range
SKU:Code: 378-825-17
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- brand Mitutoyo
- type Objective Lens
- mass 315g
- magnification 50x
- working distance 17mm
- numerical aperture 0.42
- working distance 17mm
- focal length 4mm
- resolving power (Microns) 0.7
- focal depth (Microns) 1.6
- view field 1 0.48mm Dia
- view field 2 0.10x0.13mm
The M Plan Apo NIR 50X is a precision plan apochromat objective designed for bright field inspection and laser-based applications requiring reliable imaging from the visible spectrum through to near-infrared wavelengths.
With wavelength correction across 480–1800 nm (Visible to Near-Infrared), this objective maintains image focus within the focal depth even when switching between visible and NIR illumination. This makes the M Plan Apo NIR series particularly suitable for laser repair and multi-wavelength inspection applications.
Its infinity-corrected optical design ensures flat-field imaging and strong chromatic correction across the extended spectral range. With a 17 mm working distance and a numerical aperture of 0.42, the objective delivers a resolving power of 0.7 µm, providing excellent detail for high-magnification inspection tasks. A High-Resolving Power (HR) version is available within the NIR range for applications requiring enhanced resolution.
Note: When operating above 1100 nm, the focusing position may deviate slightly from that in the visible range due to changes in glass dispersion and refractive index.
Key Features
Suitable for bright field inspection and laser-based applications
Wavelength correction from 480–1800 nm (Visible to Near-Infrared)
Designed to maintain focus when switching between visible and NIR wavelengths
High-quality Plan Apochromat optical design
Long working distance design
Infinity corrected
HR (High-Resolving Power) type available
Specifications
Model: M Plan Apo NIR 50X
Magnification: 50x
Working distance (in air): 17 mm
Numerical Aperture (N.A.): 0.42
Corrected wavelength range: 480–1800 nm
Resolving power: 0.7 µm
Depth of field: 1.6 µm
Field of view (ø24 mm eyepiece): ø0.48 mm
Field of view (1/2” camera chip): 0.1 × 0.13 mm
Parfocal distance (P.D.): 95 mm
Spectral range: Near-Infrared (NIR)
Observation mode: Brightfield
Glass compensation: No
High Resolution: No (HR version available)
Mass: 350 g