Microscope Objectives: Infinity-Corrected & Long Working Distance

Microscope Objectives for Research and Inspection

Microscope Objectives are compound lens assemblies that define the resolution, contrast, and working distance of an optical microscope or imaging system. On FindLight you can source Microscope Objectives for transmitted-light microscopy, fluorescence setups, machine-vision stations, and custom opto-mechanical assemblies in R&D and production lines.

Key Optical and Mechanical Specifications

When comparing Microscope Objectives, start with fundamental parameters:

• Magnification: Common values range from 2×–4× for survey work, 10×–40× for routine inspection, and 50×–100× for high-resolution imaging.
• Numerical Aperture (NA): Higher NA (e.g., 0.7–1.4) improves resolution and light collection but typically reduces working distance and depth of field.
• Working Distance (WD): Critical for samples in chambers, microfluidic chips, or on non-standard substrates. Long working distance Microscope Objectives trade NA for clearance.
• Optical Design: Achromat, semi-apochromat, or apochromat corrections; infinity-corrected versus finite-tube-length designs (e.g., 160 mm).
• Cover Glass Thickness: Many Microscope Objectives are specified for 0.17 mm coverslips; others are corrected for no cover glass or variable thickness.
• Spectral Range and Coatings: Broad-band anti-reflection coatings for visible, NIR, or UV; specialized fluorescence or laser-line coatings for excitation and emission paths.
• Thread and Mount: RMS (20.32 mm), M25, or vendor-specific threads; ensure compatibility with your nosepiece or objective changer.

Typical Use Cases

Microscope Objectives on FindLight support brightfield and darkfield imaging, fluorescence microscopy, wafer and mask inspection, surface metrology, and laser beam delivery or focusing in microfabrication systems. High-NA immersion Microscope Objectives (oil, water, or glycerin) are used in life-science imaging, while long working distance types suit semiconductor and industrial inspection.

Buyer Guidance on FindLight

For efficient sourcing, compare Microscope Objectives by magnification, NA, working distance, correction type, and spectral range against your system requirements. Verify mechanical interface and tube-lens compatibility in infinity-corrected systems. From the product listings you can request quotes or technical clarification from suppliers directly, with no registration required. Use FindLight to evaluate alternative Microscope Objectives side by side and document key trade-offs between resolution, throughput, and integration complexity before purchasing.