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A spherical mirror is simply a piece cut out of a reflective sphere. Its center of curvature, C, is the center of the sphere it was cut from. R, the mirror's radius of curvature is the radius of the sphere. The focal point F (the point where parallel rays are focused) is located half the distance from the mirror to the center of curvature. The focal length, f, is: focal length of a spherical mirror : f = R / 2 This is actually an approximation. Parabolic mirrors are really the only mirrors that focus parallel rays to a single point, but as long as the rays don't get too far from the principal axis then the equation above applies for spherical mirrors. If the mirror's inside surface is reflective, the mirror is concave; if the outside is reflective, it's a convex mirror. Concave mirrors can form either real or virtual images, depending on where the object is. A convex mirror can only form virtual images. A real image is an image that the light rays from the object actually pass through; a virtual image is formed because the light rays can be extended back to meet at the image position, but they don't actually go through the image position.

Led by a staff of skilled optical engineers and scientists, Edmund Optics is application-focused and pursues new ways to implement optical technology, enabling advancements in semiconductor manufacturing, industrial metrology and medical instrumentation. EO’s precision products improve efficiencies and yields, and are used in test and measurement quality assurance applications, research and the automation of manufacturing processes.

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The image formed by any mirror is located either where the reflected light converges, or where the reflected light appears to diverge from. A spherical mirror is simply a piece cut out of a reflective sphere. Its center of curvature, C, is the center of the sphere it was cut from. R, the mirror's radius of curvature is the radius of the sphere. The focal point F (the point where parallel rays are focused) is located half the distance from the mirror to the center of curvature. The focal length, f, is: focal length of a spherical mirror : f = R / 2 This is actually an approximation. Parabolic mirrors are really the only mirrors that focus parallel rays to a single point, but as long as the rays don't get too far from the principal axis then the equation above applies for spherical mirrors. If the mirror's inside surface is reflective, the mirror is concave; if the outside is reflective, it's a convex mirror. Concave mirrors can form either real or virtual images, depending on where the object is. A convex mirror can only form virtual images. A real image is an image that the light rays from the object actually pass through; a virtual image is formed because the light rays can be extended back to meet at the image position, but they don't actually go through the image position.

If the mirror's inside surface is reflective, the mirror is concave; if the outside is reflective, it's a convex mirror. Concave mirrors can form either real or virtual images, depending on where the object is. A convex mirror can only form virtual images. A real image is an image that the light rays from the object actually pass through; a virtual image is formed because the light rays can be extended back to meet at the image position, but they don't actually go through the image position.

focal length of a spherical mirror : f = R / 2 This is actually an approximation. Parabolic mirrors are really the only mirrors that focus parallel rays to a single point, but as long as the rays don't get too far from the principal axis then the equation above applies for spherical mirrors. If the mirror's inside surface is reflective, the mirror is concave; if the outside is reflective, it's a convex mirror. Concave mirrors can form either real or virtual images, depending on where the object is. A convex mirror can only form virtual images. A real image is an image that the light rays from the object actually pass through; a virtual image is formed because the light rays can be extended back to meet at the image position, but they don't actually go through the image position.

This is actually an approximation. Parabolic mirrors are really the only mirrors that focus parallel rays to a single point, but as long as the rays don't get too far from the principal axis then the equation above applies for spherical mirrors. If the mirror's inside surface is reflective, the mirror is concave; if the outside is reflective, it's a convex mirror. Concave mirrors can form either real or virtual images, depending on where the object is. A convex mirror can only form virtual images. A real image is an image that the light rays from the object actually pass through; a virtual image is formed because the light rays can be extended back to meet at the image position, but they don't actually go through the image position.

Edmund Optics

Edmund Optics Inc. (EO) has been a leading supplier of optics and optical components to industry since 1942. EO designs and manufactures a wide array of multi-element lenses, lens coatings, imaging systems and opto-mechanical equipment supporting the R&D, electronics, semiconductor, pharmaceutical, biomedical and military markets around the globe. They are known as a distributor of industrial optics and related products, as well as a source for application integration, custom lens and coating design, and OEM services.

Edmund Optics IR windows are optical windows designed for the infrared spectrum, ideal for FTIR spectroscopy, thermal imaging, FLIR or medical systems.

Edmund Optics optical filters selectively transmit or reject a wavelength or range of wavelengths for industrial machine vision inspection applications.

Edmund Optics visible windows prevent electronic sensors, detectors and sensitive optical components from being saturated or damaged by light.