BK7 Dichroic Optical Filter
Technical Specifications
| Parameter | Specification |
|---|
| 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 |
Professional Overview: The Technology of Spectral Discrimination
In the field of advanced photonics, the BK7 Dichroic Optical Filter stands as a sophisticated tool for managing light wavelengths with
extreme precision. Utilizing a high-quality Borosilicate Crown
(BK7) substrate, a BK7 Dichroic Optical Filter is engineered using multi-layer dielectric thin-film coatings.
Unlike standard absorption filters, the BK7 Dichroic Optical Filter works on the principle of optical interference, allowing specific
wavebands to pass through while reflecting others with minimal
energy loss.
The BK7 Dichroic Optical Filter is essential for systems that require simultaneous multi-channel
processing. Below are the key advantages and industries where the BK7 Dichroic Optical Filter excels:
- Sharp Cut-off Slopes: Every BK7 Dichroic Optical Filter is designed with a steep transition between transmission and
reflection, ensuring minimal spectral overlap.
- High Thermal Stability: The BK7 substrate of our BK7 Dichroic Optical Filter maintains its refractive index stability across a broad
temperature range, preventing spectral drift.
- Durable Thin-Film Coating: We utilize Ion-Assisted Deposition (IAD) for the BK7 Dichroic Optical Filter, resulting in a hard, dense coating that resists humidity and
environmental stress.
- Diverse Application Fields:
- Fluorescence Microscopy: Using the BK7 Dichroic Optical Filter as a dichroic beamsplitter to separate excitation light from
emission signals.
- Laser Beam Combining: Implementing a BK7 Dichroic Optical Filter to merge multiple laser lines into a single coaxial beam.
- Digital Projection: Utilizing a high-power BK7 Dichroic Optical Filter for RGB color separation in cinema-grade projectors.
- Machine Vision: Integrating a BK7 Dichroic Optical Filter to filter out IR noise and enhance contrast for automated
inspection.
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
- Have comprehensive design, production and sales capabilities, and
provide customers with one-stop convenient procurement services
- Possess tens of thousands of optical molds and samples, which can
provide customers with fast proofing services with low cost
- Ability to participate in customer's new product research and
development early, provide feasible plans and suggestions, and make
projects less detours
Frequently Asked Questions
Q1: How does the Angle of Incidence (AOI) affect the performance of
a BK7 Dichroic Optical Filter?
Answer: The spectral performance of a BK7 Dichroic Optical Filter is highly sensitive to the AOI. As the angle increases (e.g., from
0° to 45°), the cut-off wavelength shifts toward shorter
wavelengths (blue-shift). We calibrate each BK7 Dichroic Optical Filter coating design to account for your specific system geometry.
Q2: Can a BK7 Dichroic Optical Filter withstand high-power laser
exposure?
Answer: Yes. For high-energy applications, we optimize the BK7 Dichroic Optical Filter coating process to ensure a high Laser Induced Damage Threshold
(LIDT). This allows the BK7 Dichroic Optical Filter to be used in industrial laser cutting and marking systems without
coating failure.
Q3: Why is a ±0.005mm diameter tolerance important for a BK7
Dichroic Optical Filter?
Answer: In precision filter wheels or slide mounts, any mechanical play
can cause the BK7 Dichroic Optical Filter to tilt, leading to beam deviation. Our ±0.005 mm tolerance
ensures the BK7 Dichroic Optical Filter is centered perfectly, preserving the optical alignment of the
entire instrument.
Q4: Is the BK7 Dichroic Optical Filter better than an
absorption-type color filter?
Answer: Absolutely. Unlike absorption filters that turn unwanted light
into heat, a BK7 Dichroic Optical Filter reflects unwanted light, leading to a much higher efficiency and a
much longer lifespan under intense illumination.
Q5: What documentation is provided with a BK7 Dichroic Optical
Filter order?
Answer: Every BK7 Dichroic Optical Filter shipment is accompanied by a spectrophotometer transmission curve
and a dimensional inspection report, ensuring full transparency and
compliance with your technical requirements.
Q: What are your main products or which field do your products be
used?
A: We are specialized in optical design, optical element processing,
lenses assembly. Such as Spherical lens, Aspherical lens,
Cylindrical lens, Reflector mirror, Filter, Rod lens, Camera lenses
etc. Our products are widely used in imaging, laser, lighting etc.
Q: What's your advantage?
A:- We have about ten thousands optical modules and fixtures in stock,
and employ several outstanding technicians and managers. This
enables us to provide customers with excellent quality in short
lead times, and can save plenty of development costs for customers.
- We can help customers to optimize the optical system which they
dislike, and provide free optical solutions or suggestions.
Q: What's your MOQ?
A: 10pcs.
Q: What's your lead time?
A: 1 day for inventory and 25~35 days for new projects.
Q: What's your shipping type?
A: Usually by FedEx, DHL, TNT, EMS etc or customer appointed.
Q: What's your payment condition?
A: T/T, L/C, VISA, PayPal, Alipay or negotiation.
Q: What's your quality guarantee period?
A: Three years.
