8/28/99 2:30 PM Page 11.14 Pellicle Beamsplitters te 45 in ci de nt uncoated surface fB f D n tr an sm iss io n io ct fle A pellicle beamsplitter is a high tensile strength elastic membrane, stretched like a drumhead over a black anodized flat metal frame, and bonded to the precision lapped edge. $ There is virtually no ghosting because the thinness of the beamsplitter provides a separation between primary and ghost image of less than 4 m at 45. $ Chromatic and spherical aberration are negligible in converging beams. $ Low absorption across the visible spectrum. Nitrocellulose material does exhibit some absorption in the ultraviolet and in the infrared beyond 2 m. $ There is no change in the optical path. $ Coatings are available to provide various beamsplitting ratios. See table and figure for coating curves and suffixes. re Prisms & Retroreflectors Mirrors Cylindrical Optics Doublets & Triplets Singlets Chpt. 11 Final coated surface 2 holes thread A Filters Polarization Components Beamsplitters, Windows, Optical Flats Cleaning and Handling Pellicle surfaces must not be touched. Clean only with a gentle flow of clean, dry air. 03 BPL pellicle beamsplitters SPECIFICATIONS: PELLICLE BEAMSPLITTERS Comparison Between Glass Plate Beamsplitter and a Pellicle Beamsplitter Pellicle Thickness: 2 m Material: Select optical grade nitrocellulose Index of Refraction (nd): 1.5 Thickness Uniformity: 2 per 25 mm Surface Quality: 40-20 scratch and dig Temperature Range: 440C to +125C Frame: Hard aluminum alloy, black anodized Coatings: Available uncoated or with optional coating listed on the ext page BEAM PELLICLES GLASS High Energy Laser Optics Pellicle Beamsplitters D (mm) f (mm) te (mm) A fB PRODUCT NUMBER 25.4 50.8 76.2 101.6 152.4 34.9 63.5 88.9 114.3 165.1 4.8 6.4 6.4 6.4 9.5 2-56 2-56 2-56 2-56 6-32 30.2 57.2 82.6 108.0 158.6 03 BPL 001 03 BPL 003 03 BPL 005 03 BPL 007 03 BPL 011 Diode Laser Optics To order, select pellicle and append coating suffix from graphs on the next page. 11.14 1 Visit Us OnLine! www.mellesgriot.com Chpt. 11 Final 8/28/99 2:30 PM Page 11.15 Singlets 400 R 500 600 700 1.0 NANOMETERS 1.4 1.8 2.2 MICROMETERS typical reflectance and transmittance curves 100 80 60 40 20 T T R R 400 500 600 700 1.0 700 1.0 NANOMETERS 1.4 1.8 2.2 MICROMETERS PERCENT REFLECTANCE (R) & TRANSMITTANCE (T) R T typical reflectance and transmittance curves 100 80 60 40 20 T R R 400 T 500 600 700 1.0 NANOMETERS WAVELENGTH R R 700 1.0 NANOMETERS 1.4 1.8 MICROMETERS WAVELENGTH Pellicle beamsplitter coating /03 400 typical reflectance and transmittance curves T T R R 500 600 700 1.0 NANOMETERS 1.4 1.8 2.2 MICROMETERS WAVELENGTH Pellicle beamsplitter uncoated 1 11.15 Diode Laser Optics Visit Us Online! www.mellesgriot.com 2.2 PERCENT REFLECTANCE (R) & TRANSMITTANCE (T) T 100 80 60 40 20 High Energy Laser Optics PERCENT REFLECTANCE (R) & TRANSMITTANCE (T) T 600 MICROMETERS Pellicle beamsplitter coating /05 typical reflectance and transmittance curves 500 2.2 Filters 400 1.8 WAVELENGTH Pellicle beamsplitter coating /02 100 80 60 40 20 1.4 Polarization Components PERCENT REFLECTANCE (R) & TRANSMITTANCE (T) T 600 MICROMETERS Pellicle beamsplitter coating /04 R 500 2.2 WAVELENGTH typical reflectance and transmittance curves 400 1.8 Beamsplitters, Windows, Optical Flats 100 80 60 40 20 1.4 NANOMETERS WAVELENGTH Pellicle beamsplitter coating /01 Mirrors R PERCENT REFLECTANCE (R) & TRANSMITTANCE (T) T T Cylindrical Optics typical reflectance and transmittance curves Prisms & Retroreflectors PERCENT REFLECTANCE (R) & TRANSMITTANCE (T) Doublets & Triplets 100 80 60 40 20