What are the objective lensesexplain

We also provide custom collimating lenses for projecting a source at infinity for infinite conjugate testing of optical systems. These lenses can consist of several optical elements. The selection of optical materials and configuration depends on the entrance pupil diameter, wavelength, focal length, and field of view of the optical system under test.

Low powerobjectivelens

Collimating lenses are used to convert divergent light beams into parallel beams and are designed for various applications from the UV to visible to long wave infrared spectrum. At Shanghai Optics, we design and manufacture a wide variety of standard and custom collimating lenses for customers around the world. Learn more about these lenses and their uses below.

Room 609, 6/F, Global Gateway Tower, No.63 Wing Hong Street, Cheung Sha Wan, Kowloon, Hong Kong +852-54993705 info@shanghai-optics.com

The typical production process for a collimating lens assembly involves manufacturing the lenses through molding or polishing, followed by inspecting, coating, assembling, and testing. Although the manufacturing process remains the same regardless of the collimating lens type, the application of the lens may influence the testing method and design details, such as glass material selection and coating design. Collimating lenses can be tailored to better suit customers’ specific needs.

Infinity-corrected objectives are ideal for research-grade biomedical industrial applications especially when additional components (such as filters, dichroic mirrors, polarizers) are needed in the microscopy system. Adding optical plate components in the infinity space (shown in the Fig.2 labelled as “Parallel Optical Path) between the infinity-corrected objective and tube lens will not introduce spherical aberration, or change the objective’s working distance.

Types ofobjective lenses

We provide a variety of standard collimating lenses, including aspheric and achromatic lenses, suitable for many different light sources such as highly divergent laser diodes. Our standard collimating lenses can convert divergent laser beams into well-collimated beams, ideal for applications like interferometry, laser material processing, and laser scanning. To reduce the lead time, you can build your own beam expanders to meet application requirements by selecting different sets of our standard collimating or focusing lenses. Using our standard collimating / focusing lenses, the beam expander can be designed to have magnification up to 10 times for the wavelengths of 405 nm, 543 nm, 633 nm, 780 nm, 1064 nm, 1310 nm, 1550 nm, and 2000 nm.

Room 609, 6/F, Global Gateway Tower, No.63 Wing Hong Street, Cheung Sha Wan, Kowloon, Hong Kong +852-54993705 info@shanghai-optics.com

Whatisobjectivelens in microscope

With the ability to collimate light beams with high accuracy and high resolution, collimating lenses are an essential component of many systems for various applications including spectrometers, beam-expander systems, display measuring systems, laser illumination systems, optical fiber couplers, sensor testing systems, etc. Collimating lenses allow users to control the field of view, spatial resolution and light collection efficiency of their instruments or setups.

The most common immersion media are air, water, oil, and silicone. Choosing the appropriate objective designed for your immersion medium will result in higher resolution images.

A dry objective is designed to work with the air medium between the specimen and the objective lens, while an immersion objective requires a liquid medium to occupy the space between the object and the front element of the objective for enabling a high NA and high resolution. Figure 4 shows the oil immersion objective, which can collect more light (i.e., have a higher NA) compared to a dry objective.

NA is commonly expressed as NA = n × sinθa where θa is the maximum 1/2 acceptance angle of the objective, and n is the index of refraction of the immersion medium. The limit of resolution of a microscope objective refers to its ability to distinguish two closely spaced Airy disks. Resolution (r) = λ/(2NA) Where r is resolution (the smallest resolvable distance between two objects), and λ is the imaging wavelength. The higher the NA, the better the objective resolution.

High powerobjectivelens

At Shanghai Optics, we design and manufacture custom and pre-engineered collimating lenses to meet customers’ application requirements. For some simple projects like laser collimators and beam expanders with the need for fast turnaround time, we can provide many different standard collimating lenses with different diameters, focal lengths, coating, and mounting sizes. For collimating lenses, we offer different coating options including the coating for the wavelength of 405 nm, 543 nm, 633 nm, 780 nm, 1064 nm, 1310 nm, 1550 nm, 2000 nm, etc.

Many objective lenses are corrected for infinite conjugate distance, while others are designed for finite conjugate distance applications. Compared to infinite conjugate objectives which need a secondary lens (also called tube lens), a finite conjugate objective can generate an image of a specimen by itself. A finite conjugate objective, as shown in Figure 1, is a good, economical choice for a simple microscopy system.

If you’re looking for a more specific solution, we can also help you with custom collimating lens design and consulting. Please contact our sales team for additional information.

Objective lenses are used to magnify an image. In addition to numerical aperture, magnification is also an important parameter. The objective magnification typically ranges from 4X to 100X. As the image sensor size or eye observed area is fixed, the field of view of a microscopy system changes with the magnification of the objective lens. Typically a lower magnification objective lens will have a larger field of view and lower resolution, and a higher magnification objective lens will have a smaller field of view and higher resolution. The diameter of the FOV can be calculated by using the following formula: FOV= FN/Mag The field number (FN) in microscopy is defined as the diameter of the area in the image plane that can be observed through the eyepiece or image sensor.

Objective lenses are used in microscopy systems for a range of scientific research, industrial, and general lab applications. A microscope objective is typically composed of multiple lens elements and located closest to the object. There are so many types of microscope objectives available, choosing the right objective can help you produce good quality images at a reasonable cost. When choosing a microscope objective, we will need to consider a number of factors including conjugate distance, numerical aperture (NA), magnification, working distance, immersion medium, cover glass thickness, and optical aberration corrections. In this article, we will discuss how to choose the right microscope objective.

The optical aberration corrections determine the optical performance of an objective lens. According to the degrees of the aberration corrections, objective lenses are typically classified into five basic types: Achromat, Plan Achromat, Plan Fluorite (Plan Semi-Apochromat), Plan Apochromat, and Super Apochromat. Choosing an objective with a proper aberration correction level will help you build a microscopy system at a reasonable cost.

Scanningobjectivelens

What are the objective lensesused for

Alpha Industrial Park, Tu Thon Village, Ly Thuong Kiet Commune, Yen My District, Hung Yen Province Vietnam 17721 +84 221-730-8668 rfqvn@shanghai-optics.com

Objectivelens magnification

The most important parameter of a microscope objective is the numerical aperture (NA). NA measures the microscope objective’s ability to gather light and determines the resolution of a microscopy system.

Whenever light passes through a reflective object, it scatters into different angles. An optical collimator transforms a divergent beam of light into a parallel beam and reduces the spatial cross-section of the light beam, making it smaller. When collimating lenses are attached to light sources and/or spectrometers, the light enters the sample at a specific angle with minimal variation, contributing to stable and repeatable measurement results. Collimation ensures that light rays travel parallel to each other and do not disperse in unwanted directions.

Alpha Industrial Park, Tu Thon Village, Ly Thuong Kiet Commune, Yen My District, Hung Yen Province Vietnam 17721 +84 221-730-8668 rfqvn@shanghai-optics.com

Usually the working distance (WD) refers the distance from the front lens element of the objective to the observed object when the object is in sharp focus. Objective lenses with long working distance are needed for many scientific research applications such as atom trapping and analyzing fluid samples that require putting an object in a chamber. The resolution of a microscopy system can be significantly affected if the observed object is not placed on the designed object plane, especially for an objective with high NA.

The collimating lens typically consists of an aluminum housing with one or more lens elements and is designed with the required focal length, diameter and mount. The main purpose of a collimating lens is to collect light from a light source and produce a parallel beam of light with the required spatial resolution. A collimating lens can be attached directly to the measurement device or testing instrument. Collimating lenses can slide relative to the lens fixture to adjust the focus position.

SO offers a wide range of objective designs, which provide various degrees of optical aberration corrections for supporting different needs, such as achromatic objectives (the cheaper objectives) for laboratory microscope applications and long working distance apochromats (expensive objectives) for biological and scientific research applications. We can help you choose or design a properly corrected objective lens for meeting your application requirements.