Mitutoyo 378-005 WLI Plan Apo 5x Mirau Type
SKU:Code: 378-005
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- brand Mitutoyo
- type Objective Lens for WLI
- mass 210g
- magnification 5x
- working distance 8mm
- numerical aperture 0.28
- working distance 8mm
- focal length 20mm
- resolving power (Microns) 0.98
- focal depth (Microns) 60
- view field 1 1.46x1.12mm Dia
- view field 2 1.32x1.76mm
The WLI Plan Apo 5X is a precision plan apochromat objective developed for white light interferometry (WLI) applications. Designed to integrate seamlessly with the WLI Unit, this objective enables accurate surface profiling and high-resolution interferometric measurement.
Its optical design incorporates a beam splitter and reference mirror directly within the objective, enabling compact interferometric measurements without additional external optical components. An integrated interference fringe adjustment mechanism is included as standard, allowing precise alignment and optimisation during measurement.
The compact and lightweight construction, combined with a 60 mm parfocal distance, ensures efficient integration into interferometry systems while maintaining a working distance of 8 mm. With a numerical aperture of 0.28, the objective delivers strong resolution while providing a larger inspection field compared with higher magnification interferometric objectives.
Optimised for the visible spectral range, the WLI Plan Apo 5X is ideal for surface metrology, topography measurement, and precision inspection applications.
Key Features
Designed specifically for white light interferometry (WLI)
Beam splitter and reference mirror integrated inside the objective
Interference fringe adjustment mechanism included as standard
High numerical aperture (0.28) for improved measurement resolution
Compact and lightweight design
Parfocal distance: 60 mm for compact optical system integration
High-quality Plan Apochromat optical design
Infinity corrected
Specifications
Model: WLI Plan Apo 5X
Magnification: 5x
Working distance: 8 mm
Numerical Aperture (N.A.): 0.28
Resolving power: 0.98 µm
Focal length (f): 20 mm
Parfocal distance (P.D.): 60 mm
Applicable tube lens focal length: 100 mm
Field of view (2/3" camera): 1.32 × 1.76 mm
Field of view (WLI Unit): 1.46 × 1.12 mm
Observation mode: Interferometer
Glass compensation: No
Laser applications: No
Spectral range: Visible (VIS)
Mount: RMS (20.32 mm × 36 TP)
Outer diameter: 40 mm
Mirror tube length (excluding mounting screws): 52 mm
Mass: 210 g