Plan objective–These objectives produces a flat image across the field of view. A plan-achromat, plan-fluorite or plan-apochromat are corrected. Infinity Correction–When measuring from the back end of the objective to the primary focal plane, many microscopes are limited to a specific distance (160mm).
What is an infinity-corrected objective?
An infinity-corrected objective is a system where a light beam coming from a specimen goes through the objective lens (and does not create an image) and comes out as an infinity parallel beam through the tube lens which then creates an intermediate image.
What is the aim of microscope?
The function of the microscope is to resolve, or distinguish, fine detail which our eyes alone cannot perceive.
What is Kohler illumination and why do we use it?
Köhler illumination provides a uniformly illuminated, bright field of view, which is important when using an uneven light source, like a coiled tungsten filament. At the end of the 19th century, microscopists used sunlight or oil lamps to illuminate their specimens, and very slow film to photograph them.
What are the 4 types of objectives seen in a compound light microscope?
A compound light microscope often contains four objective lenses: the scanning lens (4X), the low‐power lens (10X), the high‐power lens (40 X), and the oil‐immersion lens (100 X).
What are the absolute values of focus differences for PL fluotars?
The absolute values of the focus differences for the red wavelength and the blue wavelength to green wavelength (3 colors) are ≤ 2.5x depth of field of the objective. PL Fluotars are powerful universal objectives with outstanding chromatic correction for at least three wavelengths which makes them suitable for fluorescence imaging.
What is the IMM of the Leica HC fluotar L?
The Leica HC FLUOTAR L 25x/1.00 IMM (n e=1.457) motCORR VISIR is specifically designed for optimized results from CLARITY-treated specimens.
What makes Leica fluotar lenses so special?
This makes them powerful photon collectors in fluorescence microscopy. Leica’s Fluotar portfolio features various application-optimized correction collars (CORR) to compensate for external influences such as temperature, coverslip thickness and immersion media.
What is the difference between flfl plan objectives and Leica semi-apochromats?
FL PLAN objectives are optimized for fluorescence, PH and DIC. Leica semi-apochromats are objectives for applications in the visual spectral range with higher specifications, offering field flatness up to 25 mm.
