- Optical Filters
- Contrast Enhancement Filters
- NIR Cutoff Filters
- Optical Filter Glass
- Suntanning Filters
- Interference Filters
NIR Cutoff Filters / Blue Filter Glass
A product family with two groups that have extraordinary properties
Used in numerous applications, NIR cutoff filters can be found just about everywhere we look in our modern lives. They are equipped to image sensors so that natural colors are produced, and they make digital cameras respond to light as our eyes do. Special NIR cutoff filters are required for any display or operation control when viewed at using a night vision system (NVIS compatible equipment), which are becoming more and more commonly used by police and rescue forcesDepending on the main application, our optical filter glass types are grouped into glasses for mobile applications and glasses for industry applications with high steepness of the NIR cutoff, respectively.
1. Group - Mobile applications
BG60, BG61, BG62, BG66, BG67, BG57 NEW
Designed to perform in difficult environments
Designed to perform in difficult environments
2. Group - High steepness of NIR cutoff
BG18, BG38 – BG42, BG50, BG55, S8022, S8023, S8612
Designed for high-precision optical applications
Designed for high-precision optical applications
SCHOTT BG57 - ultra thin and high strength
1. Group - Mobile applications
BG60, BG61, BG62, BG66, BG67, BG57 NEW
- Repeatable optical performance due to mass production
- Excellent inner quality (e.g. low striae)
- Allows true color imaging
- High NIR absorption at smaller thickness
2. Group - High steepness of NIR cutoff
BG18, BG38 - BG42, BG50, BG55, S8022, S8023, S8612
- Extraordinarily high transmittance in the visible range
- High NIR absorption
- Excellent inner quality, e.g. low striae
- Allows true color imaging
NIR cutoff filters / blue filter glass are available as:
Supply Forms |
Thicknesses |
Dimensions |
|---|---|---|
| Customized coated filters | upon request |
upon request |
| Polished substrates | ||
| Cemented filters (for special applications) |
||
| Framed filters (for special applications) |
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| Other products upon request |
Different NIR cutoff filters
1. Group - Mobile applications
BG60, BG61, BG62, BG66, BG67, BG57 NEW
Designed to perform in difficult environments
SCHOTT’s new IR filter glasses have been designed to perform in difficult environments. Equipped with a specified coating, these filters remain completely transparent for more than 1000 hours without any surface corrosion and deliver extraordinary image quality.
Designed to perform in difficult environments
SCHOTT’s new IR filter glasses have been designed to perform in difficult environments. Equipped with a specified coating, these filters remain completely transparent for more than 1000 hours without any surface corrosion and deliver extraordinary image quality.
|
|
BG60 | BG61 | BG62 | BG66 | BG67 | BG57 | |
|---|---|---|---|---|---|---|---|
| refractive index | ne | 1.5399 | 1.5370 | 1.5417 | 1.5430 | 1.5427 | 1.5547 |
| nd | 1.5379 | 1.5350 | 1.5397 | 1.5418 | 1.5405 | 1.5523 | |
| Cutoff wavelength λ0.5 | 633 nm | 648 nm | 644 nm | 634 nm | 632 nm | 634 nm | |
| at thickness | 0.3 mm | 0.3 mm | 0.21 mm | 0.21 mm | 0.175 mm | 0.11 mm | |
2. Group - High steepness of NIR cutoff
BG18, BG38 – BG42, BG50, BG55, S8022, S8023, S8612
Designed to perform for high-precision optical applications
For decades, these glasses have been popular because of the excellent optical properties they provide. These optical properties include high transmission in addition to high blocking with a very narrow transition range. Furthermore, these glasses are ideal bandpass filters for visual areas when high absorption in the near infrared (NIR) wavelength range is required. The slope of the IR edge is exceptional, and guarantees a sharp distinction between visible light and NIR radiation.
Designed to perform for high-precision optical applications
For decades, these glasses have been popular because of the excellent optical properties they provide. These optical properties include high transmission in addition to high blocking with a very narrow transition range. Furthermore, these glasses are ideal bandpass filters for visual areas when high absorption in the near infrared (NIR) wavelength range is required. The slope of the IR edge is exceptional, and guarantees a sharp distinction between visible light and NIR radiation.
|
|
BG18 | BG38 | BG39 | BG40 | BG42 | BG50 | BG55 | S8612 | S8022* | S8023* |
|---|---|---|---|---|---|---|---|---|---|---|
| Cutoff wavelength λ0.5 | 595 nm | 646 nm | 603 nm | 635 nm | 595 nm | 626 nm | 596 nm | 599 nm | 553 nm | 565 nm |
| at thickness | 1 mm | |||||||||
The optical filter glass calculation program tool will allow you to obtain a quick assessment of the appropriate solutions for your individual filter issue. Please refer to our Technical Articles & Tools for more information.
