Microscope Objective Lens

Microscope Objective Lens

The objective lens is a critical part of the microscope optics. The microscope objective is positioned near the sample, specimen, or object being observed. It has a very important role in imaging, as it forms the first magnified image of the sample. The numerical aperture (NA) of the objective indicates its ability to gather light and largely determines the microscope’s resolution, the ability to distinguish fine details of the sample.

Microscope Objectives

Leica Microsystems – The Ultimate in Optical Competence

For more than 170 years Leica Microsystems has designed and produced top-class objectives for a wide variety of applications in research, industry and medicine. The optics specialists at Leica Microsystems bring the highest level of experience and expertise to bear in reducing aberrations resulting from the physical conditions of optical components to a minimum. A sophisticated, state-of-the-art production process yields objectives that guarantee superlative image quality

Leica Microscope Objective Lenses

Leica microscope objective lenses are designed and made by our optics specialists to have the highest performance with a minimum of aberrations. The objectives help to deliver superior microscope image quality for many applications, such as life science and materials research, industrial quality control and failure analysis, and medical and surgical imaging.

Leica OEM Optic Center

Do you need an individual objective for your application? Then contact our Leica OEM Optic Center so that we can offer you a customized solution.

Leica Achromatic Lens

Leica achromats are powerful objectives for standard applications in the visual spectral range, offering field flatness (OFN) up to 25 mm. The absolute value of the focus differences between red wavelength and blue wavelength (2 colors) is ≤ 2x depth of field of the objective.

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Leica Semi-Apochromat

Leica semi-apochromats are objectives for applications in the visual spectral range with higher specifications, offering field flatness up to 25 mm. 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.

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Leica Apochromats

Leica apochromats are objectives for applications with highest specifications in the visual range and beyond, offering field flatness up to 25 mm. The absolute values of the focus differences for the red wavelength and the blue wavelength to green wavelength (3 colors) are ≤ 1.0 x depth of field of the objective.

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Frequently Asked Questions Microscope Objective

All Leica objectives are marked with codes and labels. These identify the objective, its most important optical performance properties, and the main applications it can be used for. For more information, refer to: Labeling of Objectives

The objective lens of a microscope forms a magnified, real, intermediate image of the sample or specimen which is then magnified further by the eyepieces or oculars and observed by the user as a virtual image. When a camera is used to observe the sample, then a phototube lens is installed after the objective in addition to, or even in place of, the eyepieces. The phototube lens forms a real image of the sample onto the camera sensor. The objective’s numerical aperture (NA), its ability to gather light, largely determines the microscope’s resolution or resolving power to distinguish fine details of the sample. Also, the working distance, the distance between the sample and objective, and the depth of field, the depth of the space in the field of view within which the sample can be moved without noticeable loss of image sharpness, both greatly depend on the properties of the objective lens. For more information, refer to: Collecting Light: The Importance of Numerical Aperture in Microscopy, How Sharp Images Are Formed, & Optical Microscopes – Some Basics & Labeling of Objectives

The optics of the most basic microscope includes an objective lens and ocular or eyepiece. The objective lens is closest to the sample, specimen, or object being observed with the microscope (see the schematic diagram below). For more information, refer to the article: Optical Microscopes – Some Basics
Show schematic diagram

Top-class Microscope Objectives

For standard applications, Leica Microsystems offers an extensive range of top-class microscope objectives. There are also Leica objectives which have been optimized for special applications. The highest-performance Leica objectives feature maximum correction and optical efficiency and have won several awards. All over the world, scientists are relying on Leica microscope objectives to gain insights into their area of research.

Objective Finder

To make it easier for you to find which Leica objectives work best for your microscope and application, you can take advantage of the Objective Finder

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