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Working distance is a term used in microscopy to describe the distance between the specimen and the lens. Microscopes usually have a short working distance. Microscopes use a parfocal lens that stays in focus when the magnification or focal length changes.


distance vision See distance vision. working distance (WD) 1. The distance at which a person reads or does close work. 2. In retinoscopy, the distance between the plane of the sighthole and that of the patient's spectacles. 3. In microscopy, the distance between an object and the front surface of the objective.


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.


Define working distance. working distance synonyms, working distance pronunciation, working distance translation, English dictionary definition of working distance. n. 1. The extent of space between two objects or places; an intervening space. 2. The fact or condition of being apart in space; remoteness. 3.


In physics, a force is said to do work if, when acting, there is a displacement of the point of application in the direction of the force. For example, when a ball is held above the ground and then dropped, the work done on the ball as it falls is equal to the weight of the ball (a force) multiplied by the distance to the ground (a displacement).


There are two working distances for microscopes: objective and stage. Together they define the space you have to work with objects and still focus with your microscope. Objective working distance is the vertical distance from the objective’s front lens to the closest surface of the specimen when the specimen is sharply focused.


Though both force and displacement are vector quantities, work has no direction due to the nature of a scalar product (or dot product) in vector mathematics. This definition is consistent with the proper definition because a constant force integrates to merely the product of the force and distance.


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.. Working Distance (W.D.)


Distance definition, the extent or amount of space between two things, points, lines, etc. See more. ... At a distance of about two miles from our camp was the crest of a low swell in the Plains. ... a distant place or time he lives at a distance from his work. a separation or remoteness in relationship; disparity.


The scientific definition of distance describes the length of a line between two points, or how far apart two objects are. The scalar measurement uses the curved line of the path between two locations as opposed to a vector, or straight line which begins and ends with '0.'