|
||
 |
Product Alerts
Keep current on the latest products, new suppliers, and technical articles of interest to you. (See Topics) |
Correcting Perspective Errors with Telecentricity
|
From Edmund Optics Inc.
In this example, a system is required to inspect the prototype of a hardware computer key connector to verify the placement of its pins. This is a laboratory setup requiring no automation. A precise measurement between each pin is determined using measurement software. In order to accommodate the simultaneous inspection of multiple pins, the minimum Field of View (FOV) should be about 18mm. By using some basic equations, we can specify the parameters of our system and pick a suitable CCD camera. Our system requirements dictate an 18mm field of view and a 36µm object resolution. Using these values, Eqn. 4.0 can be reduced to a ratio (Eqn. 5.0). This ratio can be used to compare the resolution of different cameras for a specific field of view (while factoring in the sensor size). We can calculate this ratio for some of our high resolution digital and analog CCD monochrome cameras: Products & Services
Fresnel lenses resemble a planoconvex or planoconcave lens that is cut into narrow rings and flattened. If the steps are narrow, the surface of each step is generally made conical and not spherical.
Search by Specification |
Learn more about Fresnel Lenses
Spherical lenses, also known as singlets, are transparent optical components consisting of one or more pieces of optical glass with surfaces so curved that they serve to converge or diverge the transmitted rays from an object, thus forming a real or virtual image of that object. This area includes micro spherical lenses as well.
Search by Specification |
Learn more about Spherical Lenses
Optical lenses are transparent components made from optical-quality materials and curved to converge or diverge transmitted rays from an object. These rays then form a real or virtual image of the object. This area includes micro lenses.
Search by Specification |
Learn more about Optical Lenses
A diffraction grating uses a substrate with parallel grooves to disperse light into its spectra. Eschelles are included in this area.
Search by Specification |
Learn more about Diffraction Gratings
Optical polarizers are optical devices that can transform unpolarized or natural light into polarized light, usually by the selective transmission of polarized rays.
Search by Specification |
Learn more about Optical Polarizers
Product Announcements
Topics of Interest
Both CCD and Monitor Resolutions are often given in terms of "TV line resolution," which is a test performed using an EIA Test Pattern target. Unfortunately, this specification has no physical units...
(Read More)
Demands for increased speed and resolution are driving the move to digital image capture technology. Learn about 5 critical factors you'll need to consider when making the move from analog to digital...
(Read More)
This white paper describes how to use the Registration module in the Matrox Imaging Library (MIIL)
In vision applications, sometimes the scene requiring inspection is too large for the camera's field...
(Read More)
It is difficult in interferometric metrology to maintain high spatial resolution over a large field of view. Interferometric microscope measurements yield high resolution, but only over a small area.
(Read More)
5.6 Carbon Nanotube MOSFETs
A MOSFET-like CNTFET can be described by the same theory presented in Sec. 5.3 for semiconductor nanowires MOSFETs. The current is independent of bandstructure, so Eqn.
(Read More)
|
|
