8.8mm 20x/0.40 Infinity-Corrected Brightfield Plan Objective No Coverglass Correction - Euromex

Benefit from the combination of flat-field Plan optics, 20× magnification with 0.40 NA and an 8.8 mm working distance to enable precise, repeatable inspection of metallographic and material samples. Order the objective directly via Metav Werkzeuge or ask our consultants for integration support.

Plan PLMi 20x/0.40 IOS objective for bScope (Euromex) — Infinity-corrected brightfield lens

The Plan PLMi 20x/0.40 is an infinity‑corrected brightfield objective optimised for materials science inspection on bScope microscopes

• Plan-corrected optics for flat, even imaging
• 20× magnification with 0.40 numerical aperture
• Infinity-corrected IOS optical design
• 8.8 mm working distance for easy sample access

Consistent, flat imaging for reliable measurements

The objective uses Plan optics to deliver a uniformly sharp image across the field, so measurements and documentation remain reliable from centre to edge. Flat-field correction reduces the need for image post-processing when documenting features on polished metal, composite or ceramic specimens. This stability is particularly important in materials science where image uniformity directly affects defect detection and dimensional evaluation.

Resolution and contrast tuned for material detail

With 20× magnification and a 0.40 numerical aperture, the lens balances resolving power and depth of field to reveal fine surface structure while maintaining practical focus tolerance. The numerical aperture quantifies light-gathering ability and influences resolution: a higher NA improves detail resolution but narrows depth of field. This configuration is suited for clear, high‑contrast brightfield observation of microstructures without sacrificing ease of focusing.

Practical working distance and sample handling advantages

An 8.8 mm working distance permits easier handling of samples and the use of ancillary tools under the lens, while the absence of cover-glass correction signals that the optics are optimised for uncovered specimens typical in metallography and materials testing. Where polished samples are inspected without a cover slip, this design avoids spherical aberrations introduced by unneeded cover-glass compensation and improves image fidelity near the surface.

Designed for modern microscope systems and brightfield workflows

The infinity-corrected IOS design integrates into optical systems that use a parallel image plane between objective and tube lens, enabling straightforward system modification and the addition of intermediate optics or cameras. Suited to bScope brightfield applications, the lens is appropriate for routine laboratory inspection, failure analysis and quality control tasks where consistent, plan-corrected performance is required. Compatibility checks with the host microscope and camera mount are advised prior to installation to ensure optimal alignment.

Contact Metav Werkzeuge for tailored advice on integrating Euromex optics into inspection workflows — our Emmerich team advises on compatibility, supply and technical details.

Technical data

• Article number: BS.8120
• Manufacturer: Euromex
• Product type: Objective / lens
• Model series: bScope
• UID: BS.8120

Facts

• Magnification: 20×
• Numerical aperture: 0.40
• Working distance: 8.8 mm

Special features

• Plan (flat-field) correction
• Infinity-corrected (IOS) design
• Brightfield application
• For bScope materials science
• No cover glass correction

FAQ

What magnification and numerical aperture does this objective provide?
The Euromex Plan PLMi 20x/0.40 objective offers 20× magnification with a 0.40 numerical aperture, providing a balance of resolution and depth of field suited to material inspection.

Can this objective be used with samples that have a cover glass?
The Euromex Plan PLMi 20x/0.40 is supplied without cover-glass correction and is intended for uncovered specimens; using a cover glass may introduce optical aberrations unless compensated elsewhere in the optical path.

Is the lens compatible with standard infinity-corrected microscopes?
Yes, the Plan PLMi 20x/0.40 is an infinity-corrected IOS objective designed for use in infinity optical systems such as bScope microscopes; verify mechanical mount and parfocal requirements before installation.

What working distance does the objective offer and why does it matter?
The objective provides an 8.8 mm working distance, offering clearance for sample manipulation and ancillary probes; this aids practical handling during metallographic preparation and inspection.

Is this objective suitable for metallography and materials science applications?
The Euromex Plan PLMi 20x/0.40 objective is specifically optimised for materials science brightfield inspection, delivering plan-corrected imaging and practical working distance for metallographic evaluation.

Euromex Microscopen bv; Typograaf 8; 6921 VB Duiven; The Netherlands; info@euromex.com