CTB-003 Cooling Color-Correction Filter
CTB-003 is a cooling color-correction filter shown in the customer sample book. Evaluate the correction with the spectrum of your actual light source.
- Measured wavelength range: 380-780 nm
- Peak transmission: ≈ 87.689% at 436 nm
- Custom options: Wavelength response, dimensions and operating conditions
Values shown are sample measurements. Final specifications are agreed for your order.
CTB-003 Cooling Color-Correction Filter
CTB-003 is a cooling color-correction filter shown in the customer sample book. Evaluate the correction with the spectrum of your actual light source.
- Measured wavelength range: 380-780 nm
- Peak transmission: ≈ 87.689% at 436 nm
- Custom options: Wavelength response, dimensions and operating conditions
Values shown are sample measurements. Final specifications are agreed for your order.

CTB-003 Reference Optical Response
CTB-003 is a cooling color-correction filter referenced to the customer sample book. Evaluate the correction with the spectrum of your actual light source.
Optical performance
- Measured wavelength range: 380-780 nm. Performance outside this interval is not established.
- Peak transmission: Approximately 87.689% at 436 nm. This is a sample measurement, not an order tolerance.
- Selection note: The customer sample-book curve is the reference for this listing. Confirm that your sample-book edition and order refer to the same design.
These values describe a measured measured sample. Custom versions and production orders have their own agreed specifications.
Choosing this filter
Compare the full source spectrum and desired transmitted region. Tell us the working angle, dimensions and required rejection.
Custom options
Discuss the wavelength response, substrate, dimensions and operating conditions with KUPO.
Transmission spectrum
Questions about CTB-003
How do I match my CTB-003 sample to the spectrum here?
This listing follows the customer sample-book reference over 380-780 nm. Its measured peak is 87.689% at 436 nm. If your factory sheet looks different, send us the edition or label rather than assuming the curves describe the same version.
What should I compare before using CTB-003 on an LED source?
The sample peak of 87.689% at 436 nm is only one point on the curve. Compare the complete sample-book spectrum with your actual lamp: the balance of blue, green and red light determines the correction. Share your source spectrum and target color balance with us.
Discuss this filter with KUPO - include the product reference, source wavelength, working angle and required dimensions.