- Leica P 0.85 S1 Condenser with Diaphragm for Microscope -
Leica catalog number 551021 (often formatted as 551 021 or 11551021)
corresponds to the Leica P 0.85 S1 substage condenser top/head.
|
Key
Specifications |
Detail |
|
Catalog /
Article No. |
551021 /
551 021 (Legacy 6-digit style) / 11551021 |
|
Type
Designation |
P 0.85 S1 |
|
Numerical
Aperture (NA) |
0.85 (Dry working aperture) |
|
Working
Distance / Air Gap |
S1 (≈1 mm focal distance/working distance to slide) |
|
Optical
Designation (P) |
Polarizing
/ Strain-Free optics |
|
Compatibility |
Modern
Leica DM Series compound stands (e.g., DM L, DM R, DM2000–DM4000) |
Key
Features:
- Strain-Free Optics ("P"): The P marking indicates that the glass
elements inside the condenser head are optical-stress-free. This prevents
internal glass stress from introducing unwanted birefringence, making it
suitable for quantitative and qualitative polarized light microscopy
(POL).
- Dry High-NA Performance: With an NA of 0.85, it delivers
near-maximum illumination aperture without needing oil immersion (which is
typically required for NA >0.90).
- S1 Working Distance: The S1
specification designates a close-range condenser top, ideal for
illuminating thin, standard slides (1.0 mm thick) through
standard-thickness stage setups.
- Modular Mount: Fits
into standard Leica dovetail/turret condenser bases, where it screws into
or mounts onto the central optical axis of the condenser carrier.
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