By lens working distance, I am referring to the distance from the end of the lens (or the end of the lens hood if in place) to the subject. This is the amount of space you have to work in. While lens working distance matters little to most of my shooting, there are situations where knowing the distance in front of the lens matters.
Microscope objectives are generally designed with a short free working distance, which is defined as the distance from the front lens element of the objective to the closest surface of the coverslip when the specimen is in sharp focus.
Working Distance and Parfocal Length Microscope objectives are generally designed with a short free working distance, which is defined as the distance from the front lens element of the objective to the closest surface of the coverslip when the specimen is in sharp focus.
Working Distance: The working distance is the distance from the front of the lens to the object under inspection (see Fig. 3). Some lenses, such as objective lenses, have a fixed working distance; many lenses will have a working-distance range. While this is probably the most straightforward parameter to specify, one must consider a few details when determining the best working distance for an ...
TCLWD is a range of telecentric lenses specifically designed for electronic and semiconductor Automated Optical Inspection (AOI) and tool pre-setting machines.. All these lenses feature a working distance of 135 mm while ensuring excellent optical resolution, high telecentricity and low distortion, thus matching and even exceeding the industrial requirements for the target applications.
The long working distance provides a wide space between the lens surface and the object. See the Objective Tutorial tab for more information about this objective type. Designed for a tube lens focal length of 200 mm, these objectives are ideal for machine vision applications or any application that requires a significant distance between the ...
Working Distance (W.D.) The distance between the front edge of the objective lens and the specimen surface (with the surface of the cover glass in case of the cover glass objective lens ) when the specimen is focused.
Lens calculator - Calculating the working distance a The object distance refers to the distance between the object ("test object", "scene", also "field of view") and the first principal plane of the lens groups somewhere in the optical system.
Working distance is a linear measurement of the distance between the tip of the objective lens and the specimen. In most compound microscopes, working distance varies by lens; however, certain microscopes have fixed working distances across their magnifications.
The object distance refers to the distance between the object (inspected part) and the centre of the optic lens groups. Unfortunately, the free working distance between the object and the front edge of the lens cannot be calculated without detailed knowledge of the lens design, but most of the time it is 2 - 3 centimetres lower.