GB1211412417014000090
NARROW BANDPASS INTERFERENCE FILTERS FOR VISIBLE, ULTRAVIOLET AND NEAR-INFRARED RADIATION. THESE PRODUCTS ARE NOT OPTICALLY WORKED. MANUFACTURING PROCESS IS AS FOLLOWS: (THE MANUFACTURER'S STATEMENT SUPPORTING THIS IS APPENDED): THESE FILTERS ARE FABRICATED ON LARGE SODA LIME GLASS SUBSTRATES. THE GLASS IS FLOAT GLASS, THEREFORE NOT POLISHED. VIA VACUUM DEPOSITION THIN LAYERS OF COATINGS ARE APPLIED TO THE GLASS SUBSTRATE. A FINISHED FILTER MAY CONTAIN AS MANY AS FIVE SUCH SUBSTRATES LAMINATED TOGETHER WITH EPOXY ADHESIVES AND DYES TO FORM A FILTER, MEETING THE REQUIRED SPECIFICATIONS. ONCE FABRICATED AND TESTED FOR COMPLIANCE WITH SPECIFICATIONS, THE LARGE GLASS WAFER IS DICED INTO SMALLER COMPONENTS OF EITHER SQUARE, RECTANGULAR OR ROUND CONFIGURATIONS. TYPICALLY THESE ARE BETWEEN 0.5 INCH AND 2 INCHES IN SIZE BUT MAY BE SMALLER OR LARGER ON OCCASION. THESE DICED OR CORED FILTERS ARE THEN SOMETIMES (BUT NOT ALWAYS) BONDED INTO ALUMINIUM RINGS. IT IS IMPORTANT TO NOTE THAT THE FILTERS ARE NOT OPTICALLY WORKED (I.E. NOT MADE FROM OPTICALLY POLISHED MATERIAL). GOODS ARE USED IN FLUORESCENCE MICROSCOPY, DIGITAL SIGNAL ENHANCEMENT, (TELECOMMUNICATIONS), SPECTRAL ANALYSIS, CHEMICAL ANALYSIS AND NUMEROUS OTHER APPLICATIONS.