Product Description

Brief Introcuction of Bandpass Filters:
Bandpass filter through a designated waves，at the same time ,cutoff other disturbing light. 
Bandpass filter types producted by OPTOLONG including long pass filter, short pass filter, laser bandpass filter, fluorescent bandpass filter, multi-bandpass filter and negative filters. Widely applied to the field of laser, license plate recognition, vehicle wheel alignment, biochemical analysis, the CCD / CMOS digital imaging, face / iris recognition, security cameras, infrared touch screen, somatosensory games, machine vision and other high-tech optical instruments.

Advantage of OPTOLONGs Bandpass Filters:
*5 years of experience in optical filters
Ion assisted deposition technique ( IAD) using
The high film layer density, high film layer firmness, high performance and stability.
A wide range of cut-off，High cut-off depth，High transmittance.
Effectively prevent stray light interference.
All filters are RoHS requirements.
OEM and ODM are welcomed!

OPTOLONG Bandpass Filter Specifications
Substrates: B**0, BK7, JGS
CWL: **0nm****0nm
CWL accuracy: above± 2 
FWHM: 7nm***0nm
FWHM accuracy: above± 2
Blocking range: **0nm****0nm
Blocking depth: OD*-OD6
Diameter(mm):φ3mm~φ**0mm
Size(mm):3×3~**0×**0
Thickness(mm)： 0.3mm~6.3mm
Surface/Coating Quality: *0 / *0, *0 / *0
Bandpass transmittance:> *5% of the common
Edge Treatment(selectable):Mounted in Black Anodized Aluminum Ring


Yulong Optics Co., Ltd. is a high technology company, which specialized in optical filter design and processing. Our products include Astronomical Filter,Bandpass Filters,Fluorescence Filters,Edge filters, Longpass & Shortpass Filters,Beam spliters,Anti-reflective Coating,Optical Mirrors and so on.

OPTOLONG Established in ***9, and located in Kunming City .We provided nearly ***0 kinds of optical coating filters every year, Business services for more than **0 optical companies all over the world, and established long-term stable cooperative relations with 4 global top **0 enterprises and 2 world famous EMS manufacturers.

We've obtained ISO***1 system certificate since ***5. Our products passed by SGS test and RoHS test . OPTOLONG is the first company who earned the Golden Supplier from Alibaba in Yunnan area, and passed certification by TUV Rheinland and Bureau Veritas independent .

All filters of OPTOLONG is in line with the European Union RoHS requirements.

OPTOLONG main equipment
Five sets of precision optical coating machine, two spectrophotometer UV***0 from shimadzu, interferometer, goniometer, resolution of the detector,ultrasonic cleaning machine, rolling machine, cutting machine, scribing machine, etc.
 
OPTOLONG R&D team
OPTOLONG has a group of rich practical experience of senior R&D team,and a group of skilled optical operation workers , various kinds of optical filter film can be designed and manufactured according to customer demand .OPTOLONGs optical filter with high quality , reasonable price and timely delivery goods,aim to create more value for you, become "Your optical filter partner!"

OPTOLONG products including three main categories :

Astronomy Filters:

We are the most professional manufacturer of astronomical filters in China,we have broken the foreign monopoly situation on astronomical filters. OPTOLONG produce more than *0 kinds of astronomical filters offers more options for amateur astronomers all over the world.

Fluorescence Filters:

We design and product all specifications of fluorescence filters,include excitation filter, emission filter,and dichroic mirror.

Laser and Bandpass Filters:

We are with the filter design and production experience for many years, can be customized bandpass filter with wavelength from **0 nm to ***0 nm.

Also others :

Edge Filter,Beam Splitters, Reflective Mirror, Anti-reflective coating, Optical windows etc. Custom filters can be fabricated:please contact our technical support staff to discuss your particular requirements.