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    HOME > Optical Filters >
    R.O.Y. glass/Long Pass Filters

    long pass filter,rocoes

    Optical Longpass Glass Filters (Red, Orange, Yellow & IR-Pass Optics)

    Optical longpass filters (commonly categorized as sharp-cut absorptive color glass filters or longpass dielectric edge filters) are precision optical elements designed to absorb or block shorter wavelengths (such as ultraviolet, blue, or visible light) while offering high optical transmittance across longer visible, near-infrared, and infrared spectral regions.

    Functions: Available in specialized optical glass matrix formulations including Yellow (GG/Y series), Orange (OG/O series), Red (RG/R series), and Infrared Pass (IR/RG series). These filters utilize internal colloidal or ionic bulk material absorption to achieve extremely sharp spectral cutoff transitions, high long-wavelength transmission ($T \ge 85\%–92\%$), and total angular stability (zero angle-of-incidence wavelength shift). They can also be paired with PVD-EBGE thin-film dielectric coatings (e.g., Anti-Reflection AR coatings) to optimize passband throughput and eliminate surface Fresnel loss.

    Applications:
    Laser safety eyewear
    Optoelectronic sensors
    Clinical diagnostic instruments
    Fluorescence inspection systems
    Photographic contrast enhancement
    Automated Optical Inspection (AOI) machine vision
    Signal-to-noise ratio optimization in Raman and spectroscopic systems.

    #R650H   #R630H   #R600H  
    #O580H   #O565H   #Y535H  
    #Y490H   #Y450H   #Information and Notes     R650H, long pass,rocoes

    ITEM NO: R650H

    Spectral Characteristics

    T50%=650 +/-15nm

    Tave>80% @ 700-1100nm

    Tave<5% @ 200-600nm

     *The spectral curve varies with the thickness of glass.

    Physical Characteristics

    Glass filters: 1~4mm

    Square: 8x8 - 150x150mm

    Round: Dia8 - 150mm

    Resistant Temperature

    Glass filters: 100℃

       R650H, long pass,rocoes

    ITEM NO: R630H

    Spectral Characteristics

    T50%=630 +/-15nm

    Tave>80% @ 680-1100nm

    Tave<5% @ 200-580nm

     *The spectral curve varies with the thickness of glass.

    Physical Characteristics

    Glass filters: 1~4mm

    Square: 8x8 - 150x150mm

    Round: Dia8 - 150mm

    Resistant Temperature

    Glass filters: 100℃

       R650H, long pass,rocoes

    ITEM NO: R600H

    Spectral Characteristics

    T50%=600 +/-15nm

    Tave>80% @ 650-1100nm

    Tave<5% @ 200-540nm

     *The spectral curve varies with the thickness of glass.

    Physical Characteristics

    Glass filters: 1~4mm

    Square: 8x8 - 150x150mm

    Round: Dia8 - 150mm

    Resistant Temperature

    Glass filters: 100℃

       O580H,long pass,rocoes

    ITEM NO: O580H

    Spectral Characteristics

    T50%=580 +/-15nm

    Tave>80% @ 630-1100nm

    Tave<5% @ 200-530nm

     *The spectral curve varies with the thickness of glass.

    Physical Characteristics

    Glass filters: 1~4mm

    Square: 8x8 - 150x150mm

    Round: Dia8 - 150mm

    Resistant Temperature

    Glass filters: 100℃

       O565H,long pass,rocoes

    ITEM NO: O565H

    Spectral Characteristics

    T50%=565 +/-15nm

    Tave>80% @ 630-1100nm

    Tave<5% @ 200-510nm

     *The spectral curve varies with the thickness of glass.

    Physical Characteristics

    Glass filters: 1~4mm

    Square: 8x8 - 150x150mm

    Round: Dia8 - 150mm

    Resistant Temperature

    Glass filters: 100℃

       y535H, long pass,rocoes

    ITEM NO: Y535H

    Spectral Characteristics

    T50%=535 +/-15nm

    Tave>80% @ 590-1100nm

    Tave<5% @ 200-480nm

     *The spectral curve varies with the thickness of glass.

    Physical Characteristics

    Glass filters: 1~4mm

    Square: 8x8 - 150x150mm

    Round: Dia8 - 150mm

    Resistant Temperature

    Glass filters: 100℃

       y490H, long pass,rocoes

    ITEM NO: Y490H

    Spectral Characteristics

    T50%=490 +/-15nm

    Tave>80% @ 540-1100nm

    Tave<5% @ 200-440nm

     *The spectral curve varies with the thickness of glass.

    Physical Characteristics

    Glass filters: 1~4mm

    Square: 8x8 - 150x150mm

    Round: Dia8 - 150mm

    Resistant Temperature

    Glass filters: 100℃

       y450H, long pass,rocoes

    ITEM NO: Y450H

    Spectral Characteristics

    T50%=450 +/-15nm

    Tave>80% @ 500-1100nm

    Tave<5% @ 200-400nm

     *The spectral curve varies with the thickness of glass.

    Physical Characteristics

    Glass filters: 1~4mm

    Square: 8x8 - 150x150mm

    Round: Dia8 - 150mm

    Resistant Temperature

    Glass filters: 100℃
     
    Information and Notes

    1. Red, orange, and yellow glass filters utilize bulk matrix absorption to absorb shorter wavelengths (ultraviolet and blue light) while delivering high optical transmission across red, orange, yellow, and near-infrared spectral regions.

    2. Spectral transmittance curves represent physical sample measurements captured at normal incidence (0° angle of incidence, AOI).

    3. Absorptive optical glass components are generically referred to as "colored glass filters," "optical colored glass," or "color filters."

    4. Spectral transmittance and cutoff steepness vary with substrate thickness according to the Beer-Lambert law; thicker glass increases optical density in absorption bands and sharpens edge transitions.

    5. Explore related products and technical solutions:
    long pass,rocoes long pass,rocoes long pass,rocoes
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