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Overview of BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 Alumina Ring Bandpass Glass Filter Bandpass Filter
BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 Alumina Ring Bandpass Glass Filter Bandpass Filter is advanced porous structures made from high-purity aluminum oxide (Al₂O₃). Designed for extreme temperature (up to 1600°C) and chemical resistance, they provide efficient filtration of molten metals, gases, and aggressive fluids in industries like metallurgy, chemical processing, and environmental engineering.
Key Features of BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 Alumina Ring Bandpass Glass Filter Bandpass Filter
High-Temperature Stability – Withstands up to 1600°C without structural degradation
Controlled Porosity – Precise pore sizes (10-1000µm) for tailored filtration efficiency
Exceptional Chemical Resistance – Resists acids, alkalis and corrosive media
High Mechanical Strength – Maintains integrity under pressure and thermal cycling
Customizable Shapes & Sizes – Available in discs, tubes, and complex geometries

(BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 Alumina Ring Bandpass Glass Filter Bandpass Filter)
Specifications of BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 Alumina Ring Bandpass Glass Filter Bandpass Filter
This BP808nm bandpass filter takes care of tough light work. It centers on 808 nanometers. Its band is 40 nanometers large. This filter lets via almost all the light at 808nm. We rate its transmission at T99.9%. That suggests virtually no light loss in the passband.
It blocks unwanted light strongly. Outside its passband, it red light very well. It accomplishes Optical Thickness 4 (OD4) and Optical Thickness 6 (OD6). OD4 blocks 99.99% of roaming light. OD6 obstructs 99.9999%. This makes it excellent for noisy environments. It stops light from screwing up your signal.
The filter makes use of top notch bandpass glass. This glass is created sharp filtering. It provides secure performance. The glass is difficult. It takes care of different temperature levels well. It withstands damages.
We place this glass filter in a solid alumina ring. Alumina is light weight aluminum oxide ceramic. It is extremely difficult. It shields the glass edges. The ring makes the filter solid. It quits damaging. It provides a solid base for placing. You can handle it safely. You can install it conveniently.
This filter is ideal for laser systems. It works well with 808nm diode lasers. It isolates the laser line. It gets rid of history sound. It benefits scientific instruments. It aids in clinical gadgets. It suits commercial sensing units. Its high transmission gives a strong signal. Its deep stopping maintains the signal clean.
The specifications are clear: Facility Wavelength 808nm, Bandwidth (FWHM) 40nm, Transmission T > 99.9%, Obstructing OD4 & OD6, Building Bandpass Glass in Alumina Ring. This filter supplies trusted light control.

(BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 Alumina Ring Bandpass Glass Filter Bandpass Filter)
Applications of BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 Alumina Ring Bandpass Glass Filter Bandpass Filter
The BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 is an accuracy optical element. It allows via a certain band of light. The facility wavelength is 808 nanometers. The transmission capacity is 40 nanometers large. This filter transfers over 99.9% of the light within this band. That indicates very little light is shed in the desired array.
It additionally obstructs unwanted light very efficiently. It achieves an Optical Thickness of 4 on one side. It attains an Optical Density of 6 on the other side. This means it obstructs roaming light very well. It protects against light outside the 808nm band from travelling through. This is critical for tidy signals.
The filter features an alumina ring. This ceramic ring makes the filter strong. It protects the delicate glass filter inside. The ring likewise helps with installing the filter firmly. This style guarantees secure efficiency in demanding arrangements. It takes care of physical stress better.
This filter is important for many applications. It works completely with 808nm laser diodes. These diodes are common in numerous fields. The filter isolates the laser’s certain wavelength. It gets rid of unwanted background light or various other discharges.
Use it in medical gadgets like laser treatment systems. It makes sure just the restorative laser light gets to the target. It secures sensing units from various other light sources. Utilize it in industrial laser handling. It guards sensors or overviews the light beam precisely.
It is crucial in clinical instrumentation too. Utilize it in fluorescence microscopy or spectroscopy arrangements. It chooses the specific excitation or discharge wavelength required. It boosts dimension precision dramatically. It boosts signal clearness.
The filter is also key in optical interaction test devices. It isolates certain signal networks at 808nm. It strains noise successfully. Utilize it in LiDAR systems. It aids spot the mirrored laser pulse accurately. It rejects ambient light interference.
Quality control is rigorous throughout manufacturing. This guarantees the filter fulfills its specs reliably. The alumina ring guarantees long-term durability. This filter is a reputable remedy. It offers exact wavelength control and outstanding blocking. It is suitable for requiring expert and commercial settings.
Company Profile
Alumina Technology Co., Ltd,. We focus on the research and development, production and sales of alumina products, serving the electronics, ceramics, chemical and other industries. Since its establishment in 2005, the company has been committed to providing customers with the best products and services, and has become a leader in the industry through continuous technological innovation and strict quality management.
Our products includes but not limited to Alumina Boat, Alumina Crucible, Alumina Dish, Alumina Foam Filter, Alumina Plate, Alumina Rod, Alumina Bar, Alumina Balls, Filter Alumina, Nano Alumina Powder, Spherical Alumina Powder, ect. please feel free to contact us.(nanotrun@yahoo.com)

Payment Methods
T/T, Western Union, Paypal, Credit Card etc.
Shipment Methods
By air, by sea, by express, as customers request.
5 FAQs of BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 Alumina Ring Bandpass Glass Filter Bandpass Filter
Here are 5 FAQs about the BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 Alumina Ring Bandpass Glass Filter:
What does this filter do?
This filter lets light pass through. It only passes light near 808 nanometers. The bandwidth is 40 nanometers. This means light from about 788nm to 828nm gets through. Light outside this range gets blocked. It blocks light very well.
Why is the 40nm bandwidth important?
The bandwidth is key. It defines the specific light range the filter works with. A 40nm bandwidth is precise. It isolates the 808nm light effectively. This precision is needed in many scientific and industrial tools. It ensures only the exact light you want is used.
How well does it block unwanted light?
This filter blocks light extremely well. Inside the pass band (788nm-828nm), over 99.9% of the light transmits. That’s T99.9%. Outside this band, it blocks light powerfully. It blocks light to Optical Density 4 (OD4) and Optical Density 6 (OD6). OD4 means it blocks 99.99% of unwanted light. OD6 means it blocks 99.9999%. This high blocking stops stray light from interfering.
What is the alumina ring for?
The filter glass is mounted in a ring. This ring is made of alumina. Alumina is very hard. It protects the delicate filter glass. Alumina handles heat well. It won’t warp easily. This ring makes the filter strong. It is good for tough environments. The ring also makes the filter easy to mount in equipment.
How do I clean this filter?
Handle the filter carefully. Only touch the alumina ring. Avoid touching the glass surface. Use clean, dry, compressed air first. Blow off loose dust. For smudges, use a pure solvent like methanol. Put solvent on lens tissue. Gently wipe the glass. Never rub hard. Never use abrasive cleaners. Keep the filter covered when not in use.

(BP 808nm FWHM 40nm Band Pass Optical Filter T99.9% OD4 OD6 Alumina Ring Bandpass Glass Filter Bandpass Filter)
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