ROCOES Optical

Precision Blue Glass Substrates & Filters (NIR Absorbing Optics)

Blue glass filters (also categorized as ionic blue colored glass or phosphate optical absorptive filters) are specialized optical glass elements formulation-engineered to transmit visible blue/cyan spectral bands while absorbing longer orange, red, and near-infrared (NIR) wavelengths.

Functions:
Imparts high optical transmittance across the blue-green spectrum (~400 nm–550 nm) while providing strong bulk matrix absorption in orange and red wavelengths (~600 nm–700 nm) and deep suppression across near-infrared bands (~700 nm–1100 nm). Because spectral attenuation is driven by internal glass ion absorption, these filters maintain absolute angle-of-incidence (AOI) stability without wavelength shifting or back-surface interference reflection ghosting, essential for high-fidelity digital imaging sensors.

Applications:
Precision photometers
CMOS/CCD camera lens modules
Color correction in medical imaging
Optoelectronic detection equipment
Automated Optical Inspection (AOI) machine vision systems

ITEM NO: BH01

Spectral Characteristics

Tave>75% @ 360-460nm

Tave=35% +/-10% @ 550-1100nm

 *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℃

ITEM NO: BH02

Spectral Characteristics

Tave>75% @ 360-460nm

Tave>70% @ 750-1100nm

 *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℃

ITEM NO: BH03

Spectral Characteristics

Tave>75% @ 350-420nm

Tave<5% @ 500-680nm

Tave>80% @ 750-1100nm

 *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℃

ITEM NO: BH04

Spectral Characteristics

Tave>50% @ 350-420nm

Tave<5% @ 500-680nm

Tave<25% @ 720-1100nm

 *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℃

ITEM NO: BH05

Spectral Characteristics

Tave>60% @ 360-470nm

Tave<10% @ 550-1100nm

 *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℃

ITEM NO: BH10

Spectral Characteristics

Tave>75% @ 360-580nm

Tave<30% @ 800-1100nm

 *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℃

ITEM NO: BH1

Spectral Characteristics

Tave>75% @ 360-530nm

Tave<30% @ 650-1100nm

 *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℃

ITEM NO: BH12

Spectral Characteristics

Tave>65% @ 400-520nm

Tave<5% @ 630-1100nm

 *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℃

ITEM NO: BH13

Spectral Characteristics

Tave>40% @ 430-510nm

Tave<5% @ 650-1100nm

 *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℃

ITEM NO: BH24

Spectral Characteristics

Tave>60% @ 350-440nm

Tave<5% @ 520-680nm

Tave<25% @ 700-1100nm

 *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℃