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Products / Microscopes /Objective Lens /Physiology/Life Sciences Objectives /Correction CollarObjective /

Correction CollarObjective

Overview Specifications Application Principles & Advantages FAQ Order Now

A CORR objective is an objective equipped with a correction collar. SIMTRUM’s CORR objectives adjust internal lens groups through the collar to correct optical aberrations—especially spherical aberration—thereby improving image quality.Among them, our CXKT040 model also provides apochromatic correction.

Dimensions

Items	CXKT040
Optical System	Infinity-corrected
Observation Method	Brightfield
Chromatic Aberration Correction	Apochromat
Magnification [X]	40X
Focal Length [mm]	5
Field Number [mm]	25
Numerical Aperture (NA)	≥0.60
Entrance Pupil Diameter [mm]	≥6
Working Distance (WD) [mm]	4.57-3.39
Depth of Focus (μm)	1.52
Depth of Field (μm)	3.3
Resolution (μm)	0.59
Cover Glass Thickness [mm]	-
Spring Protection	-
Parfocal Distance [mm]	45-45.68
Thread	WJ4/5”X1/36”
The resolution and depth of focus of the objectives are calculated based on a reference wavelength (λ=550nm)	550

Our CORR objectives are particularly suitable for the following applications:

Long-term imaging of temperature-sensitive samples such as live cells
Imaging environments where the refractive index of the medium varies
Situations involving variations in coverglass thickness

The core feature of a CORR objective is its correction collar. By rotating the collar, the spacing between the internal lens elements can be finely adjusted. This adjustment alters the optical path to compensate for optical path differences caused by variations in medium conditions, temperature, and other factors. As a result, spherical aberration is effectively eliminated, ensuring that the objective consistently operates at its optimal performance and delivers high-resolution, high-brightness, and sharp images.

Q: How should I choose the appropriate numerical aperture (NA)?

A: Numerical aperture primarily influences resolution, light-collection efficiency, and working distance. A higher NA provides higher resolution and stronger light-gathering capability (resulting in brighter images), but also comes with a shorter working distance, shallower depth of field, and higher cost.

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Compare	Model		Drawings & Specs	Availability	Reference Price (USD)
		CXKT040 Working Distance (WD) [mm]:4.57-3.39;Numerical Aperture (NA):≥0.60;Magnification [X]:40X;Focal Length [mm]:5		Contact us	Request for quote

CXKT040 - Parameter

CXKT040 - Download

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