In case of smallest image details and large magnifications please use macro-lenses which are specially designed for these applications.įurther details on optical calculations can be found in chapter Optical basics. The Rayleigh criterion stated in the equation 1.22 /D gives the smallest possible angle between point sources, or the best obtainable resolution. Especially in case of very small working distances of several centimetres, the calculated values are no longer realistic. The calculated working distances refer to the optic centre of the lens housing.
By means of additional spacers, however, the lens distance can be reduced ("see calculation of close-up rings"). In case of F-mount lenses and other lenses for larger image circle diameters, the minimum lens distances are often considerably larger.
Hinweis: Zur einfachen Berechnung bitte einen Wert in der Dropdownbox selektieren! Eingabe eigener Werte durch Auswahl von "User def." in DropDown-Liste!Ĭalculating the working distance using object size and opening angleĪttention: Calculated working distances below 150 to 300 millimetres cannot be focused using normal C-mount lenses. Send your calculation with your own email program (MailTo-link).Īrbeitsabstand: mit Pixelgröße Sensor, Brennweite und Bauteilgröße rechnen We respect your privacy: We do not store any inputs, results or recipients. Length/ size of inspected object in mm (field of view FOV): Note: Even when using the drop-down lists own values can be entered. Where is the angular resolution (radians), is the wavelength of light (m), and D is the.
In case of smallest image details and large magnifications please use macro-lenses which are specially designed for these applications.įurther details on optical calculations can be found in chapter Optical basics.Using object size& opening angle Calculating the working distance using focal length, object and sensor size Camera resolution can be determined by the equation. Lets say that at day time the pupil size is 3 mm and the optimal sensitivity is 0.55 m, we can apply the rule. Especially in case of very small working distances of several centimetres, the calculated values are no longer realistic. So according to Rayleigh's Criterion, we can calculate the spatial resolution of human eye.
Using object size& opening angle Calculating the working distance using focal length, object and sensor size