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

The M Plan Apo NIR B 50X is a high-performance plan apochromat objective designed for bright field inspection and laser-based applications requiring extended clearance and stable multi-wavelength performance.

Optimised for wavelength correction from 420–1064 nm (Visible to Near-Infrared), this objective ensures reliable imaging across a broad spectral range, making it well suited for inspection and laser processing applications.

A key feature of the NIR B series is its ultra-long 25.5 mm working distance, significantly improving operability while maintaining the same numerical aperture performance as the standard NIR 20X/50X models. This extended clearance allows easier access to larger components and complex setups without compromising image quality.

Engineered with an infinity-corrected optical design, the M Plan Apo NIR B 50X delivers flat-field imaging, excellent chromatic correction, and stable focus performance when switching between wavelengths within its specified range.

Key Features

Suitable for bright field inspection and laser-based applications

Wavelength correction from 420–1064 nm (Visible to Near-Infrared)

Ultra-long 25.5 mm working distance for improved operability

High-quality Plan Apochromat optical design

Infinity corrected

Maintains NA performance while extending working distance

Specifications

Model: M Plan Apo NIR B 50X

Magnification: 50x

Working distance (in air): 25.5 mm

Numerical Aperture (N.A.): 0.42

Corrected wavelength range: 420–1064 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): 0.24 × 0.13 mm

Parfocal distance (P.D.): 95 mm

Spectral range: NIR

Observation mode: Brightfield

Glass compensation: No

High Resolution: No

Mass: 375 g