the actual distance from the centre o f the lens to the illuminated object, U is 20.0 cm.Calculate the focal length f, o f the lens using the equation ...](b)The student
Imaging device containing an electrooptic material to adjust the effective focal length of a lens element A first substrate (2) carries an array (3) of imaging elements (4). An array (5) of lens elements (6) is provided with each lens element (6) associated with at least one imaging ...
In a method for determining focal length of a lens mounted to a camera a distorted image of a scene is captured. A distortion-correction function is applied on the distorted image or on a portion of the distorted image. A most representative distortion-correction function is identified and by...
If the focal length of a refractor does not really depend on the scope's actual length, why would some manufacturers choose to make refractors with very short back focus? For instance, why wouldn't they simply shorten the tube by a few centimeters to make the back focus longer and the ...
The present article reports a shearing interferometric technique for determining the various lens' parameters, namely, the focal length, refractive index, radii of curvatures etc. The wave aberrations have also been investigated for the different values of the focal length of the same lens by immersi...
η is the vertical projection angle, x is the position of the light spot of beam 16 on position sensing detector 26 in millimeters, f is the focal length of lens 24 which is for the lens of FIG. 1 is 24 millimeters, BL is the instrument baseline which is 750 millimeters and φ is ...
A potpourri of tips for extending battery life, improving your high-speed exposures, and determining which focal-length lens to use. Gives pieces of advice on extending battery life, improving high-speed exposures and determining focal-length. Information on the string measurement techni... Sint,St...
lidar sensor, determines distance between a motor vehicle (1) and objects (4, 5) in a surrounding area of the motor vehicle. A spatial distance between two points on the objects is determined via intercept theorems from measured object gap, focal length of lens of the camera and image ...
It is shown in the Specification that the equation in the X, Y plane of the image 31 of a body 33 lying in a plane containing the X axis and at an angle # with the Z, X plane is the ellipse where 1/m is the focal length of lens 30, and it is likewise shown that the ...
The arrangements presently described improve on the prior art by utilising more realistic theoretical modelling of the behaviour of lens optics in real world conditions, and by providing a more robust means of estimating depth from defocus in a scene independent manner and in the presence of imaging...