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China Suppliers Factory: High-Precision Infrared Dual-Channel Filter (WBP+LP) for Gas Detection & Analysis
| Product Name | 50% left | 50% right | LP50% | WBP-Blocking(nm) | Tmin | Tavg | LP-Blocking(nm) | Tmin | Tavg | Size (mm) | Sub Material | Previous cut-off area | Tavg | Intermediate cut-off area | Tavg | Spectrogram |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WBP1.6~2.3+LP3.6 | 1600 | 2300 | 3600 | 1700~2200 | / | ≥93 | 4000~6000 | / | ≥90 | Φ0.1~300 | Si | 400~1550 | <1 | 2350~3550 | <2 |
|
| WBP1.75~2.3+LP3.7 | 1750 | 2300 | 3700 | 1800~2250 | / | ≥80 | 3750~5000 | / | ≥90 | Φ0.1~300 | Si | 400~1600 | <1 | 2350~3650 | <2 |
|
| WBP1.75~2.3+LP3.9 | 1750 | 2300 | 3900 | 1800~2250 | / | ≥80 | 4100~5500 | / | ≥90 | Φ0.1~300 | Si | 400~1600 | <1 | 2400~3650 | <2 |
|
| WBP3-5+LP7500 | 3000 | 5000 | 7500 | 3250~4750 | / | ≥85 | 7750~14000 | / | ≥85 | Φ0.1~300 | Ge | 400~7250 | / | / | / |
|
| WBP10.3~11.3 + LP11500 | 10600 | 11450 | 11650 | 10750~11300 | / | ≥80 | 11800~12400 | / | ≥80 | Φ0.1~300 | Ge | / | / | / | / |
|
| Combined filter WBP+LP | 10600 | 11500 | 11700 | 10600~11300 | / | ≥80 | 11800~12550 | / | ≥80 | Φ0.1~300 | Ge | 7000~14000 | <1 | / | / |
|
The above list shows our current stock items.
If you don't see what you are looking for, please
Frequently Asked Questions (FAQ)
What substrate materials are used for these optical filters?
We primarily use Silicon (Si) and Germanium (Ge) as substrate materials, chosen for their excellent transmission properties in the infrared and mid-to-long wave infrared spectrum.
What size options are available for the filters?
Our standard stock items support sizes ranging from Φ0.1 mm up to 300 mm. Custom dimensions can be tailored to meet your specific application requirements.
What is the typical average transmission (Tavg) of these filters?
Depending on the specific model, the average transmission (Tavg) ranges from ≥80% up to ≥93%, ensuring high-efficiency performance for optical systems.
What do the "WBP" and "LP" designations mean?
"WBP" refers to Wide Bandpass filters, which transmit a specific band of light, while "LP" refers to Longpass filters, which transmit wavelengths longer than a specific cut-off point.
Can I request custom parameters if my requirements are not in the stock list?
Yes, absolutely. If you cannot find the specifications you need in our standard stock list, you can contact us directly to request custom optical designs and dimensions.





