Brightfield/Darkfield Observation Objective OBJ-20X0.45-WD3
These bright-field and dark-field (BD) infinity-corrected objectives provide diffraction-limited performance throughout the visible spectrum. Advanced multielement optics, optimized coatings, and infinity correction minimize aberrations and increase transmission for excellent images. Optimized coaxial bright- or dark-field illumination suits high-contrast imaging and inspection. Long working distance also supports integration into lasers for coaxial viewing and visible-laser focusing, providing precise microscopy and focusing at suitable distances. Applications include microscopes, machine vision, laser systems, and precision optical inspection where resolution and image quality matter. Dark-field microscopy uses oblique illumination so direct light misses the objective, which collects surface scattering against a dark background. This improves visibility of edges, particles, defects, and irregularities in semiconductors, materials science, precision manufacturing, and biological imaging, revealing fine features difficult to distinguish under ordinary bright-field illumination.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Optical System | Infinity-Corrected (Infinity-Corrected) |
| Chromatic Aberration Correction | Apochromatic (Apochromatic) |
| Operating Wavelength | 430 ~ 660nm |
| Matching Tube Lens Focal Length | 200mm |
| Objective Field Number | >25mm |
| Effective Focal Length | 10mm |
| Object-Side (NA) | 0.45 |
| Working Distance | 3mm |
| Object-Side Resolution | 0.61 µm |
| Depth of Field | 1.36 µm |
| Parfocal distance | 45mm |
| Interface | M26×0.706 |
Applications
Key Features
Datasheet
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