ARRAY SIZE: The physical size of the OpticRAM array from the 1st to the last pixel. The size can be looked at from many points of view. Care must be exercised in how the scene is projected onto the array via the optics.
Example: From the 1st pixel to the last pixel the column size = 174.016 mils and the row size of either section = 34.52 mils. The row dimension of the total array (of both arrays plus space pixels) = 73.764 mils.
FIELD OF VIEW (FOV): The maximum image dimension plus an allowance for alignment and part variation.
FOCAL LENGTH (F)> Type of lens, defined in millimeters. The present lens that is shipped with the camera is a 16mm C-mount lens.
F-STOP: The opening of the iris on the lens is calibrated in f-stops. Each higher number requires twice the light on the object for the same amount of light falling on the array.
LENS TO IMAGE DISTANCE (S'): The distance from the lens to the image (scene).
LENS TO OPTICRAM DISTANCE (S): The distance from the shoulder of the lens mount to the surface of the integrated circuit inside the OptiCRAM package (plane of best focus). A lens extender may be required for objects that are closer to the lens than the normal lens design dictates.
MAGNIFICATION (M): A camera lens is a transformation device that will make the image projection onto the array either smaller or larger depending on the lens and the distance away from the lens. The ratio of the object's true size to the size of the projection on the array is called the magnification. ~
PIXEL COUNT: A count of the number of pixel pitches that an aspect of the image traverses on the array, directly proportional to the magnification. In image space each pixel pitch represents a minimum resolution (image resolution).
RESOLUTION: The smallest size that is of interest in the field of view of the camera. The resolution is pixel pitch times the magnification.
Z AXIS CHANGE: The change in the distance between the camera and the object. As the distance between the scene and the camera decreases, the image projected onto the OpticRAM gets bigger, and therefore covers more pixels. As the distance between the scene and camera increases, the image gets smaller. If the distance between the camera and the scene is closer than the lens will focus, a spacer can be inserted between the lens and the camera to extend the focus range, or a different lens may be used to enhance the focus. The spacer length formula is used to determine the size of the spacer needed.