Optical Mirrors Specifications

Help with Optical Mirrors specifications:

Mirror Types

	Your choices are...
	Flat Mirror		Flat mirrors are smooth, highly polished, flat surfaces for reflecting light. The actual reflecting surface is usually a thin coating of silver or aluminum on glass.
	Laser Mirror		Laser mirrors are designed for high reflectance and durability at individual laser wavelength ranges.
	Parabolic Mirror		Parabolic mirrors offer excellent correction of spherical aberration.
	Reflector		Parabolic reflectors and ellipsoidal reflectors are used to maximize illumination or projection system output by increasing light source efficiency.
	Spherical Mirror		Spherical mirrors are curved so that reflected beams converge on a focal point.
	Other		Any other mirror type not listed above.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Mirror Assembly		A single or several mirrors mounted for a particular function. Mirror assemblies consist of a mirror, mirror support system and an interface to mount onto mechanical equipment that provides optical alignment.
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Performance The distance between the mirror and the point to which an incident bundle of parallel light rays will converge.

	Focal Length:		Focal length is from the center of the reflector to the point where reflected collimated light converges for parabolic reflectors. The distance of the light source from the reflector for elliptical reflectors.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Secondary Focal Length:		Secondary focal length is the point at which the reflected light converges outside the reflector.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Wavelength Range		Wavelength range is the particular area of the spectrum the mirror was designed to perform best in.
	Search Logic:		User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
	Diameter/Width:		Diameter is the mirror if viewed straight on. Could also be thought of as the height.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Thickness:		The thickness of the mirror at its widest point.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Radius of Curvature:		If a mirror's curvature was extrapolated into a sphere, the radius of that sphere is the radius of curvature for that mirror.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

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Mirror Shape

	Your choices are...
	Round		The flat mirror is round in shape when viewed in the front or back.
	Rectangular / Square		The flat mirror is square or rectangular in shape when viewed in the front or back.
	Elliptical		The flat mirror is elliptical in shape when viewed in the front or back.
	Other		Any other mirror shape not listed above.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Mirror Materials

			Mirror material refers to the classification of the material used to make the mirror. The material used influences the reflectivity characteristics of the mirror.
	Your choices are...
	BK7 Glass		BK7 is boro-crown glass (borosilicate glass).
	Copper		Copper is typically used in high power applications because of its high thermal conductivity.
	Fused Silica		Fused silica has a very low coefficient of thermal expansion, and is ideal for use with moderately powered lasers or changing environmental conditions.
	Nickel		Nickel is considerably more durable than glass substrates, both to thermal and physical damage.
	Optical Crown Glass		Optical crown glass is typically used in non-imaging applications, including light gathering or conventional beam manipulation tasks. Crown glass is generally used when thermal stability is not a critical factor.
	Pyrex®		Pyrex® can be used for a wide variety of mirror applications.  This material has good thermal stability. Pyrex is a registered trademark of Corning Incorporated.
	UV Grade Fused Silica		UV grade fused silica is of higher quality than fused silica.
	Zerodur®		Zerodur® is a glass-ceramic material that has great thermal stability. It is widely used in applications where the utmost in dimensional stability is needed. Zerodur is a registered trademark of Schott Glass Technologies, Inc.
	Other Mirror Material		Any other mirror material not listed above.
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Mirror Coatings

			Mirror coatings are used to enhance the reflectivity of a mirror.
	Your choices are...
	Uncoated		No coating on the mirror.
	Bare Aluminum		Aluminum is an excellent reflector in the upper UV, visible, and near infrared. The surface is soft and must be handled with care.
	Enhanced Aluminum		Enhanced aluminum has a multilayer film of dielectrics on top to enhance the reflectance in the visible or ultraviolet region. The multilayer film also provides the handling characteristics of the protected aluminum coating.
	Protected Aluminum		Protected aluminum has a coating as an overcoat to protect the delicate aluminum. This treatment provides an abrasion resistant surface while maintaining the performance of aluminum.
	Dielectric		Dielectric coatings are multi-layer coatings, which offer excellent performance over a specific wavelength range and are relatively insensitive to small angle changes. Dielectric coatings tend to be more durable than metal coatings.
	Bare Gold		Gold coatings provide consistently high reflectance in the near-IR to far-IR, and are the most widely used material in these regions. Gold, however, is soft and easily scratched.
	Protected Gold		Protected gold coatings provide consistently high reflectance in the near-IR to far-IR, and are the most widely used material in these regions. Gold, however, is soft and easily scratched. A protective overcoat provides an abrasive resistant surface, while maintaining the performance of the gold.
	Rhodium		Rhodium coating has a reflectivity of approximately of 80% throughout the visible spectrum. Rhodium coated nickel is considerably more durable then glass substrates both to thermal and physical damage.
	Silver		Silver coatings are superior in reflectance to aluminum. However, its strong tendency to oxidize and tarnish means that it must be thoroughly sealed from the atmosphere in order to avoid degradation.
	Other Mirror Coating		Any other mirror coating not listed above.
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Mirror Surface

	Surface Quality:		Surface quality of the filter glass.
	Your choices are...
	10-5 Scratch / Dig		A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 10 / 5 indicates the average diameter of the digs to be .05 mm and the average length of a scratch is .10 mm.
	20-10 Scratch / Dig		A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 20 / 10 indicates the average diameter of the digs to be .10 mm and the average length of a scratch is .20 mm.
	40-20 Scratch / Dig		A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 40 / 20 indicates the average diameter of the digs to be .20 mm and the average length of a scratch is .40 mm.
	60-40 Scratch / Dig		A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 60 / 40 indicates the average diameter of the digs to be .40 mm and the average length of a scratch is .60 mm.
	80-50 Scratch / Dig		A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 80 / 50 indicates the average diameter of the digs to be .50 mm and the average length of a scratch is .80 mm.
	Other		Any other Scratch / Dig surface quality rating.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Surface Flatness:		The surface flatness of the mirror, given in terms of λ (λ=633nm).
	Your choices are...
	λ/2		The biggest variation in surface height for the mirror is no more than λ/2 (λ=633nm).
	λ/4		The biggest variation in surface height for the mirror is no more than λ/4 (λ=633nm).
	λ/5		The biggest variation in surface height for the mirror is no more than λ/5 (λ=633nm).
	λ/8		The biggest variation in surface height for the mirror is no more than λ/8 (λ=633nm).
	λ/10		The biggest variation in surface height for the mirror is no more than λ/10 (λ=633nm).
	λ/20		The biggest variation in surface height for the mirror is no more than λ/20 (λ=633nm).
	Other		Any other surface flatness in terms of λ(λ=633nm)
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Reflector / Parabolic Mirror Specs

	Clear Aperture:		Clear aperture is the diameter of the reflector where light is designed to exit.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Central Hole Diameter:		Reflectors have a hole in the center. The diameter of this hole.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Reflector / Parabolic Mirror Shape		Different reflector geometries result in different reflector performance.
	Your choices are...
	On-axis Parabolic		On-axis parabolic reflectors collect radiation from a source at its focal point, and reflect it as a collimated beam parallel to the axis.
	Off-axis Parabolic		Off-axis paraboloid reflectors are a circular segment from one side of a full paraboloid. The focal point is off the mechanical axis, giving full access to the reflector focus area.
	Ellipsoidal		Ellipsoidal reflectors have two conjugate foci. Light from one focus passes through the other, after reflection. Ellipsoids collect a much higher fraction of total emitted light than a spherical mirror.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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