Phase Contrast Microscopes
Phase Contrast is one of the best methods for viewing transparent or translucent specimens without staining the specimens and without a loss of resolution. The use of Phase Contrast Microscopes has proven to be a valuable tool for medical researchers in the study of living cells, cultures, human chromosomes/genes and many applications mentioned below. Prior to the introduction of phase contrast, living cells other semi-transparent specimens were viewed in brightfield microscopy by various staining techniques.
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ACCU-SCOPE 3000 LED Asbestos Phase Microscope with Slider Phase Set 10x and 40xR & Walton Beckett Reticle – NIOSH 7400
ACCU-SCOPE 3000 LED Phase Microscope Series – Infinity Plan 10x, 40xR, 100xR and 20x Phase Objective with Phase Slider
ACCU-SCOPE 3000 LED Phase Microscope Series – Infinity Plan 10x, 40xR, 100xR and LWD 20x Phase Objective Suitable for Makler Counting Chamber
The phase contrast effect is simply achieved by superimposing a circular phase annulus located in the substage condenser with a corresponding circular phase ring located in the back focal plane of the objective lens and specimens subjected to phase contrast illumination often appear to be surrounded by halos. They appear against a grayish background if used with plain white light, and appear against a green background if used with a green filter in the light path.
Phase contrast microscopes are available as simple phase contrast microscopes which include 10x and 40x phase objectives with a pre-centered phase slider or as fully equipped phase contrast microscope which includes a Zernike Condenser and a full complement of phase objectives; 10x, 20x, 40x & 100x Oil Immersion Objective and a centering phase telescope.