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Filter glass material from Hoya is produced in standard ground sheet 165mm x 165mm in a range of sizes 4mm to 9mm thick. The glass is then processed to the final polished filter. For processing See custom page
Hoya colour filter glass range includes the following optical filter types:
Blue filters: Hoya B370, B390, B410, B460
Green filters: Hoya G530, G533, G545, G550
Light balancing filters (amber): Hoya LA20, LA40, LA80, LA140
Light balancing filters (blue): Hoya LB20, LB40, LB80, LB120, LB145, LB165, LB200
Colour compensating filters: Hoya (Cyan) C500N, CN500, CAW500, CM500
Colour compensating filter: Magenta Hoya M30
Florescent colour compensating filters: Hoya FLD60, FLW85
Neutral density filters: Hoya ND0, ND03, ND13, ND25, ND40, ND50, ND70
Heat absorbing filters: Hoya HA30, HA50
Ultraviolet transmitting visible absorbing filters: Hoya U330, U340, U360
Contrast filter: Hoya AC54, AC115
Multiband calibration filters (didymium): Hoya V10, V30
Multiband calibration filter (holmium): Hoya HY1
Ultraviolet transmitting filters: Hoya UV30, UV34, UV22
Skylight filters: Hoya L1B
Sharp cut filters (yellow): Hoya Y44, Y48, Y50, Y52
Sharp cut filters (orange): Hoya O54, O56, O58
Sharp cut filters (red): Hoya R60, R62, R64, R66
Infrared transmitting filters: Hoya IR76, IR80, IR83, IR85
Infrared transmitting filters: Hoya RM90, RM1000
Infrared bandpass filters: Hoya RT830
All these glasses are located in the Filter Types listing.
The colour specification is to CIE equivalents of colour according to the CIE 1931 standard colourimetric system and the CIE 1964 supplementary standard colourimetric system.
Hoya glass filters may be strengthened by tempering or chemical strengthening process to be impact or thermal shock resistant.
The polished surfaces may be printed with identification marks or screen-printed designs. Coating also may be applied to the surface for anti-reflection and filter stability.
Some typical applications and products use:
Ultraviolet equipment, general photography, infrared systems, bandpass, colour correction, 3-colour separation, lowering colour temperature, raising colour temperature, photo sensitiser correction, fluorescent lamps, electronics reduction of light intensity, absorbing heat radiation, CRT display (P-43 phosphor), monochrome CRT display, checking wavelength calibration, electronic instruments, scientific instruments.
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