Edmund Optics
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 25mm Edmund Opal Diffusing Glass optical diffuser $8.99 Time Remaining: 12d 11h 54m Buy It Now for only: $8.99 |
 Edmund Optics Rack and Pinion Stage $9.99 Time Remaining: 5d 23h 44m |
 Edmund Optics TECHSPEC MgF2 Coated 6x6 Lens 10 NEW $10.00 Time Remaining: 4d 23h 37m Buy It Now for only: $10.00 |
 Edmund Optics Achromat 125mm 25EFL Laser Lens $19.95 Time Remaining: 23d 3h 9m Buy It Now for only: $19.95 |
 Edmund Optics TECHSPEC MgF2 Coated 20x20 Lens 10 NEW $10.00 Time Remaining: 18d 18h 57m Buy It Now for only: $10.00 |
 Lot 6 Melles Griot Edmund Optics Laser Pinhole Slit 25 50 400 500 Micron NEW $149.99 Time Remaining: 22d 4h 33m Buy It Now for only: $149.99 |
 Edmund Opal Diffusing Glass optical diffuser 25mm NT46 167 $20.00 Time Remaining: 22d 17h 59m Buy It Now for only: $20.00 |
 New Edmund Optics T32 328 Prism RA 5MM UNCTD TS $15.00 Time Remaining: 15d 19h 25m Buy It Now for only: $15.00 |
 Lot 3 Edmund Optics NT03 632 Brass Spacer Ring 1mm $7.50 Time Remaining: 23d 16h 11m Buy It Now for only: $7.50 |
 Edmund Optics PCX Lens 200mm Dia x 200mm FL MgF2 NEW 20 NT45 238 $20.00 Time Remaining: 14d 19h 28m Buy It Now for only: $20.00 |
 Lot 3 Edmund Optics NT03 631 Brass Spacer Ring 050mm $7.50 Time Remaining: 23d 16h 9m Buy It Now for only: $7.50 |
 Edmund Optics 02X TECHSPEC Silver Series Telecentric Lens 58 427 $510.00 Time Remaining: 26d 22h Buy It Now for only: $510.00 |
 Qty 2 Edmund Optics Precision Pinhole 5um Part 38537 5 Microns New $65.00 Time Remaining: 3d 22h 18m Buy It Now for only: $65.00 |
 EDMUND OPTICS NT55 350 1X TELECENTRIC LENS $300.00 Time Remaining: 22d 22h 11m Buy It Now for only: $300.00 |
 Edmund Optics Silver Series Telecentric Lens Mounting Clamp 175 56870 $75.00 Time Remaining: 26d 22h Buy It Now for only: $75.00 |
 EDMUND OPTICS 36408 USAF RESOLUTION TARGET NEGATIVE $135.00 Time Remaining: 6d 58m Buy It Now for only: $135.00 |
 Edmund Optics NT45 029 Plano Concave Lens 25mm Diameter x 50 FL MgF2 Coating $19.99 Time Remaining: 13d 22h 6m Buy It Now for only: $19.99 |
 Edmund Optics 2X TECHSPEC Silver Series Telecentric Lens 58 431 $425.00 Time Remaining: 9d 22h 46m Buy It Now for only: $425.00 |
 Edmund Optics 568nm Filter P N 43075 Brand new 15 $15.00 Time Remaining: 17d 1h 35m Buy It Now for only: $15.00 |
 Edmund 6 F 10 Precision Optical Spherical Mirror w adjustable mount $282.00 Time Remaining: 23h 59m Buy It Now for only: $282.00 |
 Edmund Optics 90 Deg Angle Mount NT39 355 $12.95 Time Remaining: 12d 13m Buy It Now for only: $12.95 |
 Edmund Optics lot of 6 Lens Filters $75.00 Time Remaining: 14d 5h 18m Buy It Now for only: $75.00 |
 New Edmund Optics Achromat 125mm Laser Lens Sealed $24.95 Time Remaining: 23d 3h 4m Buy It Now for only: $24.95 |
 Edmund Optics Magnified Crosshair Reticles Scope $65.00 Time Remaining: 4d 3h 38m Buy It Now for only: $65.00 |
 Edmund Optics lot of 12 Lens Filters $120.00 Time Remaining: 17d 21h 22m Buy It Now for only: $120.00 |
 7 NEW 20mm Edmund Optics TECHSPEC B270 Optical Window $51.99 Time Remaining: 21d 1h 45m Buy It Now for only: $51.99 |
 Edmund Optics Interference Filter Model 45672 $45.00 Time Remaining: 29d 2h 33m Buy It Now for only: $45.00 |
 NEW IN BOX EDMUND OPTICS PRECISION ASPHERIC LENS 25MM $154.99 Time Remaining: 17d 19h 50m Buy It Now for only: $154.99 |
 Edmund Optics 37919 Iris Diaphragm with Filter Holder $45.00 Time Remaining: 27d 18h 46m Buy It Now for only: $45.00 |
 NEW Edmund Optics 56930 OPTICAL STAND w MELLES GRIOT Assembly $229.95 Time Remaining: 24d 3h 29m Buy It Now for only: $229.95 |
 Edmund Optics Near IR Achromatic Lens 12mm Dia x 20mm FL NIR II Coating NIB $79.99 Time Remaining: 14d 20h 52m Buy It Now for only: $79.99 |
 Edmund Optics 32853 NT32 853 Plano Convex Lens 12mm Dia x 48mm FL MgF2 Coating $19.99 Time Remaining: 13d 21h 35m Buy It Now for only: $19.99 |
 Edmund Optics 45096 NT45 096 Plano Convex Lens 150mm Dia x 40mm FL MgF2 Coating $19.99 Time Remaining: 13d 21h 56m Buy It Now for only: $19.99 |
 Edmund Optics first surface mirror FS 25 x 35 TS gold $30.00 Time Remaining: 20d 20h 11m Buy It Now for only: $30.00 |
 Edmund Optics NT02 075 02075 Float Glass Window 63mm Diameter Lot Of 2 $9.99 Time Remaining: 21d 22m Buy It Now for only: $9.99 |
 Edmund Optics TECHSPEC Laser Diode Beam Expander 6X expander and 4x Back End $245.00 Time Remaining: 26d 22h Buy It Now for only: $245.00 |
 Edmund Optics BOROFL 75mm Laser Optic Window Part 43894 New $69.00 Time Remaining: 5d 2h 38m Buy It Now for only: $69.00 |
 Edmund Optics Optical Mount 1 2 Diameter with 1 adapter P N 53964 $95.00 Time Remaining: 23d 8h 55m Buy It Now for only: $95.00 |
 Edmund Scientific Optical Flat 1 1 10 Wave $50.00 Time Remaining: 6d 17h 31m Buy It Now for only: $50.00 |
 Edmund Optics 150 Micron Slit Pair Model NT53 934 $30.00 Time Remaining: 22d 2h 49m Buy It Now for only: $30.00 |
 Edmund Optic Round Sapphire Window 50mm Part NT45 817 294 Laser Optics $125.00 Time Remaining: 4d 1h 8m Buy It Now for only: $125.00 |
 NEW Edmund Optics polarizer 9mm NT43 783 $20.00 Time Remaining: 22d 15h 43m Buy It Now for only: $20.00 |
 Edmund Optics 48917 Elliptical Plate Beamsplitter 50x71 Visible 50 50 $85.00 Time Remaining: 14d 7h 56m Buy It Now for only: $85.00 |
 VINTAGE EDMUND OPTICS PRISM 35MM LAB EQUIPMENT BOXED $7.89 (1 Bid) Time Remaining: 6d 2h 55m |
 Edmund Optics Interference filter Model 46158 $39.00 Time Remaining: 19d 23h 44m Buy It Now for only: $39.00 |
 LOT 10 EDMUND OPTICS RODENSTOCK LENSES COKIN FILTERS $74.99 Time Remaining: 25d 2h 34m Buy It Now for only: $74.99 |
 Edmund Optics 1951 USAF HI Resolution Glass Slide Target 64862 Positive Test 3x3 $999.00 Time Remaining: 7d 20h 57m Buy It Now for only: $999.00 |
 LOT 6 Edmund Optics Multi Axis 25mm Mirror Mount Clamp Positioning Beam Splitter $74.99 Time Remaining: 9d 3h 47m Buy It Now for only: $74.99 |
 Edmund Optics Lot of 11 Lens Filters $115.00 Time Remaining: 17d 22h 5m Buy It Now for only: $115.00 |
 Edmund Optics 016X TECHSPEC Silver Series Telecentric Lens 56 675 $475.00 Time Remaining: 27d 20h 58m Buy It Now for only: $475.00 |
 Edmund Optics RED CORRECTOR Filter Window 50x50mm $19.50 Time Remaining: 9d 22h 22m Buy It Now for only: $19.50 |
 EDMUND OPTICS 25mm SQ Window Model 45183 $10.00 Time Remaining: 28d 2h 47m Buy It Now for only: $10.00 |
 Lot 27+ Vintage Laboratory Experimental Optics Lenses Prisms Edmund Scientific $200.00 Time Remaining: 23d 6h 23m Buy It Now for only: $200.00 |
 EO Edmund Industrial Optics P75 $52.00 Time Remaining: 29d 2h 9m Buy It Now for only: $52.00 |
 QTY7 Optical Lens Filters Huge Lot Newport Edmund $60.00 Time Remaining: 1d 20h 8m Buy It Now for only: $60.00 |
 Edmund Optics 52275 2x Telecentric Convertor Adaptor $40.00 Time Remaining: 19d 1h 6m Buy It Now for only: $40.00 |
 Edmund Optics Broadband Interface Filter 2415 mm Laser $40.00 Time Remaining: 26d 1h 30m Buy It Now for only: $40.00 |
 Lot of 10 Edmund Optics Coated PCX Lens 15mmX30mm $65.00 Time Remaining: 7d 56m Buy It Now for only: $65.00 |
 Edmund Optics HP TML 40X Telecentric Lens Assembly LEC 58432 $415.00 Time Remaining: 15d 2h 59m Buy It Now for only: $415.00 |
 NEW EDMUND OPTICS 45805 NIR ACHROMATIC LENS 25MM X 75MM $65.00 Time Remaining: 5d 2h 20m Buy It Now for only: $65.00 |
 NEW Edmund Optics Blue Filter Mounted 255mm x 05mm Threaded Lab Camera Color $24.99 Time Remaining: 10d 9h 7m Buy It Now for only: $24.99 |
 NEW Edmund Optics Red Filter Mounted 255mm x 05mm Threaded Lab Camera Color $24.99 Time Remaining: 10d 10h 2m Buy It Now for only: $24.99 |
 Qty 2 Edmund Optics WINDOW HIGH AR 3 x 3 Blue Laser Optic Window 46101 $60.00 Time Remaining: 5d 22h 16m Buy It Now for only: $60.00 |
 NEW Edmund Optics Microscope Eyepiece Reticle 21mm $80.00 Time Remaining: 20d 14h 39m Buy It Now for only: $80.00 |
 Edmund Optics Multi Axis Lens Positioning Mount Rotate Tilt + Mirror $169.00 Time Remaining: 1d 23h 4m Buy It Now for only: $169.00 |
 Edmund Optics 25mm HE NE Mirror NEW Laser Optic Mirror $45.00 Time Remaining: 11d 1h 18m Buy It Now for only: $45.00 |
 Edmund Scientific Optics Microscope Monocular w 36 Fiber Optic Ring Light $349.99 Time Remaining: 22d 9h 42m Buy It Now for only: $349.99 |
 WATEC LCL 902C BK 12 VDC CAMERA EDMUND OPTICS OBJ 10 MMS 55 903 LENS ADAPTER $239.00 Time Remaining: 22d 5h 47m Buy It Now for only: $239.00 |
 WATEC LCL 902C BK 12 VDC CAMERA EDMUND OPTICS OBJ 10 MMS 55 908 r 4 LENS $259.00 Time Remaining: 22d 5h 46m Buy It Now for only: $259.00 |
 NEW Edmund Optics 1 4 N BK7 20mm Precision Window VIS 0 Coating CTD Lab Laser $29.99 Time Remaining: 10d 9h 27m Buy It Now for only: $29.99 |
 NEW Edmund Optics 1 20 25mm High Power Laser Line Window 1064nm V Coat Lab $79.99 Time Remaining: 10d 9h 52m Buy It Now for only: $79.99 |
 Edmund Optics Red Corrector Lens Filter 50mmX50mm $25.95 Time Remaining: 22d 2h 35m Buy It Now for only: $25.95 |
 Edmund Industrial Optics Laser Optic Lens Lab Lazer Photonics Lens $249.99 Time Remaining: 20d 21h 28m Buy It Now for only: $249.99 |
 APPLIED MATERIALS PN 3440 01037 EDMUND SCIENTIFIC INDUSTRIAL OPTICS $299.00 Time Remaining: 2d 23h 37m Buy It Now for only: $299.00 |
 NEW Edmund Optics Manual Micro Positioning Stage 05 Travel X Axis Translation $109.99 Time Remaining: 10d 9h 27m Buy It Now for only: $109.99 |
 EO Edmund Industrial Optics 25mm Window 1 Wave BB NEW $93.40 Time Remaining: 15d 22h 42m Buy It Now for only: $93.40 |
 Qty 3 Edmund Optics Laser Optic Windows 50mm SQ BOROFL 48543 New $99.00 Time Remaining: 5d 20h 40m Buy It Now for only: $99.00 |
 Edmund Optics FILTER ND ABS 50MM SQ 25 $40.00 Time Remaining: 21d 2h 13m Buy It Now for only: $40.00 |
 NEW Edmund Optics NDYAG Dual Band Laser Line 25mm Mirror 1064nm 635 670nm 45 $99.99 Time Remaining: 10d 9h 37m Buy It Now for only: $99.99 |
 Edmund 2 Axis Optical Positioner 2 Optics $29.99 Time Remaining: 11d 1h Buy It Now for only: $29.99 |
 EDMUND OPTICS WITH BASE PLATE STAINLESS STEEL LINEAR STAGE LASER PART $139.99 Time Remaining: 8d 5h 32m Buy It Now for only: $139.99 |
 EDMUND INDUSTRIAL OPTICS WITH BASE PLATE STAINLESS STEEL LINEAR STAGE LASER PART $289.99 Time Remaining: 8d 5h 36m Buy It Now for only: $289.99 |
 EDMUND OPTICS MI 150 FIBER OPTIC ILLUMINATOR $335.00 Time Remaining: 18d 17h 31m Buy It Now for only: $335.00 |
 EDMUND OPTICS NT47 293 MOUNTED NEAR IR ACHROMATIC LENS NIR 35mm $165.00 Time Remaining: 3d 19m Buy It Now for only: $165.00 |
Edmund Optics
An Introduction to Optical Coatings
An Introduction to Optical Coatings
By: R.L. Fielding
Optical coatings are used to manipulate the reflectance and transmittance of an optical component. Typical optical coating examples include: Antireflection Coatings which reduce the amount of light reflected at a given wavelength or wavelength range; Narrow Band Filters which allow only a given window of wavelengths to transmit; and High Reflector Coatings, used in the production of mirrors. More specifically, custom optical lens coatings utilize broadband and v-coat anti-reflection coatings to optimize application results. Broadband custom optical lens coatings work over a large spectral range, typically, Ultraviolet, Visible, or Infrared, to reduce reflectance and increase transmittance, while V-coat custom optical lens coatings work best at a specific wavelength.
Coatings are designed for a specific incident angle of light and for a specific polarization of light such as S-polarized, P-polarized, or random polarization. If a coating is designed for light at a zero degree angle of incidence, but is used with light at a forty-five degree angle of incidence, the coating will not perform at the stated transmission/reflection specifications. Similarly, coatings are generally designed for randomly polarized light so using S- or P-polarized light with a coating designed for randomly polarized light will again fail to produce the stated specifications.
Coatings are created by depositing dielectric and metallic materials such as SiO2, TiO2, or Al, in thin layers that are typically equal in thickness to one-quarter the wavelength of the light used in the application. These thin films alternate between layers of high index of refraction, and low index of refraction, thereby inducing the interference effects needed. Most optics have some form of coating Optical companies are also able to design and apply custom coating solutions.
Below are definitions of common terms used in the optical coatings industry:
Crystal Thickness Control:
The oscillating frequency of a quartz crystal declines from 5 MHz as coating materials are deposited on the crystal. Consequently, the thickness of the coating on the crystal can be calculated by measuring the fall of the crystal's oscillation frequency. The crystal is positioned at the center of the coating chamber and the coating thickness on the crystal is used to calculate the coating thickness on the optics.
Dielectric:
Material exhibiting very high transmission (non-absorption) across many wavelengths - from the UV through Visible wavelengths and into the IR.
Optical Monitoring:
Direct measurement of an optic's reflectance, performed by reflecting light off the optic and measuring the intensity of the reflected light. A similar procedure can be applied to measuring transmittance. For certain applications, the Optical Monitoring technique yields greater precision than crystal thickness control.
Spatter:
Material unintentionally ejected in larger particulate form from the coating material chunk. These particles can become embedded in the substrate as surface defects.
Thin Film:
Any film that produces constructive or destructive interference effects when light is transmitted through or reflected from it.
There are a range of techniques used in the application of optical coatings. The three most common coating application techniques are:
IBS: Ion Beam Sputter. Sputter process in which energetic ions are produced by an ion gun.
PVD: Physical Vapor Deposition. A coating material is heated causing evaporation such that evaporate condenses on the optic, leaving a film. Coating material can be heated by a focused beam of electrons or by heat derived through electrical resistance.
Sputter: Energetic molecules of coating material are created by smashing accelerated ions into a target of coating material. The sputtered material then forms a durable, stable deposit on the optic. The accelerated ions are normally produced from a plasma of inert Argon.
For more educational materials on optical coatings, please visit the Edmund Optics Technical Library: http://www.edmundoptics.com/techsupport/library.cfm. The engineering staff at Edmund Optics has written and assembled a comprehensive archive of FAQ's, articles, application notes and real-world examples for use.
About Edmund Optics
For over 65 years Edmund Optics (EO) has been a leading producer of optics, imaging, and photonics technology. EO’s state of the art manufacturing capabilities combined with its global distribution network earned it the position of the world’s largest supplier of off-the-shelf optical components, including lens kits and near IR cameras for complex machine vision applications. To learn more, visit http://www.edmundoptics.com/.
About the Author
R.L. Fielding has been a freelance writer for 10 years, offering her expertise and skills to a variety of major organizations in the education, pharmaceuticals and healthcare, financial services, and manufacturing industries. She lives in New Jersey with her dog and two cats and enjoys rock climbing and ornamental gardening.
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