Spectrographic

Miscellaneous Microscope Objective Lens

£150
Image Part Number Price Variant Purchase Quantity
Meiji S. Plan M 40x/0.65 ME1 £150.00 Meiji S. Plan M 40x/0.65
Prior 5x/0.12 PR1 £15.00 Prior 5x/0.12
Reichert Plan Fluor LWD Epi 20x/0.40 R1 £150.00 Reichert Plan Fluor LWD Epi 20x/0.40
Union MF 80x/0.9 UN2 £100.00 Union MF 80x/0.9
Unitron MPL 5x/0.10 UT1 £10.00 Unitron MPL 5x/0.10

Spectrographic

Miscellaneous Microscope Objective Lens

£150

Refurbished Microscope Objectives for reflected light microscopy

The objective lens

This is the most important single optical component in the system for it fulfills the following criteria


  • Collects light

  • Controls the resolution of the image

  • Controls the magnification of the image.

  • Forms the primary image


The objective lens requires a large numerical aperture at the same time as having a small field of view.

  • The Numerical Aperture (NA) of a lens is a function of the maximum angle of light a lens can accept from the object plane that defines the light collection capability of the lens.

  • The NA can range from 0.05 for low power lenses at 1.4 x up to 0.95 ( the maximum NA for air lenses) for dry lenses at 60x Oil immersion lenses can have an NA of 1.4 for magnifications between 40 and 100x.

  • A nose piece of a typical metallurgical microscope has four objective lenses that are parfocal – ie. all have an equivalent focal plane on rotation of the nose piece.


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