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Imaging 1.5mm To 300mm BK7 Dichroic Bandpass Filter
The Imaging 1.5mm To 300mm BK7 Dichroic Bandpass Filter is a precision optical filtering component designed to selectively transmit a defined wavelength range while reflecting or blocking unwanted spectral regions. Built on high-quality BK7 optical glass substrates, this dichroic bandpass filter leverages advanced thin-film coating technology to achieve sharp spectral cutoffs, high peak transmission, and excellent environmental stability. The wide size range from 1.5 mm to 300 mm allows this filter to be integrated into compact imaging modules as well as large-scale optical systems.
In imaging applications, spectral accuracy and signal-to-noise ratio are critical. The Imaging 1.5mm To 300mm BK7 Dichroic Bandpass Filter is engineered to deliver precise wavelength selection, ensuring that only the desired spectral band reaches the detector. This is particularly important in fluorescence imaging, machine vision, and multispectral analysis, where even minor spectral leakage can degrade measurement accuracy. The BK7 substrate provides excellent optical homogeneity and a refractive index of approximately 1.517 at 587.6 nm, ensuring minimal wavefront distortion and high image quality.
Additionally, the multilayer dielectric coating used in the Imaging 1.5mm To 300mm BK7 Dichroic Bandpass Filter is optimized for durability and performance. It offers high transmission within the passband (often >90%) and strong blocking outside the passband (OD3-OD6 or higher depending on design). Customization options include central wavelength (CWL), bandwidth (FWHM), angle of incidence, and coating durability, allowing precise adaptation to specific imaging systems and lighting conditions.
Specifications
Materials
BK7 or other optical glass, quartz, sapphire, Ge, Si, ZnSe, CaF2 etc
Length
5~200mm
Width
5~200mm
Diameter
1.5~300mm
Center thickness tolerance
+/-0.01mm
Length tolerance
+/-0.01mm
Width tolerance
+/-0.01mm
Diameter tolerance
+/-0.0005mm
Surface accuracy
N=1~3
Irregularity
ΔN=0.1~0.5
Surface quality
10/5~60/40
Coating
Upon request
Application area
Imaging, Lighting, Laser etc
Applications
Fluorescence Imaging: Isolating excitation and emission wavelengths in biological and medical imaging systems.
Machine Vision: Enhancing contrast and reducing background noise in industrial inspection systems.
Spectral Analysis: Used in instruments requiring precise wavelength discrimination.
Astronomy & Remote Sensing: Filtering specific spectral bands for observation and data acquisition.
Laser Systems: Selecting or isolating specific laser wavelengths for measurement and processing.
Medical Diagnostics: Imaging systems requiring high spectral accuracy and signal integrity.
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Company Profile
Shanghai Advance Optical-Electronics Technology Co., Ltd. is a technology-based production enterprise, officially established in September 2009. The plant site is located in Qingpu Industrial Park, Shanghai, only half an hour's drive from Shanghai Hongqiao International Airport. The company gathers several excellent technicians in the optical industry and has comprehensive supporting capabilities such as optical mechanical and electrical design, processing and sales services. We wholeheartedly provide each customer with high-quality and convenient products and services.
Business Scope: optical mechanical and electrical module development, precision optical element processing, camera lens design and processing, optical design and optical path optimization solutions, technical consultation and after-sales service.
Application Fields: machine vision, artificial intelligence, biomedical, smart city, high-end monitoring, testing instruments, equipment, laser etching, special lighting, scientific research institutions, etc.
Company Advantages:
Comprehensive design, production and sales capabilities, providing customers with one-stop convenient procurement services
Tens of thousands of optical molds and samples, enabling fast proofing services with low cost
Early participation in customer's new product research and development, providing feasible plans and suggestions to minimize project detours
Certifications
Exhibition
Packing & Delivery
Frequently Asked Questions
What is the function of the Imaging 1.5mm To 300mm BK7 Dichroic Bandpass Filter?
It selectively transmits a specific wavelength range while blocking or reflecting unwanted wavelengths, improving imaging accuracy and signal quality.
Why is BK7 used as the substrate material?
BK7 offers excellent optical homogeneity, low inclusions, stable refractive index, and high transmission in the visible and near-infrared range, making it ideal for imaging applications.
What does "bandpass" mean in this filter?
A bandpass filter allows only a defined wavelength range (bandwidth) to pass through while rejecting wavelengths outside that range.
Can the filter be customized for specific wavelengths?
Yes, the Imaging 1.5mm To 300mm BK7 Dichroic Bandpass Filter can be tailored in central wavelength, bandwidth, coating performance, and size to match specific imaging or optical system requirements.
What industries use this type of filter?
It is widely used in biomedical imaging, machine vision, spectroscopy, laser systems, astronomy, and advanced optical instrumentation.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2009
Total Annual:
8000000-10000000
Employee Number:
45~100
Ecer Certification：
Verified Supplier
1. We possess comprehensive capabilities in design, production and sales, providing customers with one-stop convenient procurement services and saving a great deal of time and cost for both new and existing projects.
2. We have tens of thousands of optical molds and samples, offering customers low-... 1. We possess comprehensive capabilities in design, production and sales, providing customers with one-stop convenient procurement services and saving a great deal of time and cost for both new and existing projects.
2. We have tens of thousands of optical molds and samples, offering customers low-...
