Background too high
Record the unwanted wavelength range, detector response and current blocking target.
Problem review
Optical filter problem review for RFQs
Describe the optical symptom, signal wavelength and unwanted light path before choosing a filter family or requesting a custom option.
Signal too weak
Record the useful wavelength window, transmission target, AOI and any sample or source constraints.
Channel leakage
List adjacent channels, excitation and emission windows, and where separation must improve.
Convert the symptom into measurable fields
Problem language is useful at intake, but the RFQ still needs measurable optical fields. Describe what is passing, what should be blocked and which part of the system creates the constraint.
- For fluorescence separation, include excitation, emission and detector windows.
- For cutoff uncertainty, include the useful band and the unwanted wavelength range.
- For attenuation, include target OD range and spectrum coverage.
- For angle-sensitive systems, include AOI and beam geometry.
Catalog examples that shape review questions
Reviewed catalog entries show why problem review asks for both useful and blocked regions. Shortpass examples such as SP580, SP850 and SP970 use center wavelength, working band, transmission and blocking depth fields. A narrowband example such as NBP800 adds blocking ranges around the pass band and FWHM.
What to attach
Attach spectra, channel lists, drawings and current part references when available. These files help review whether the request is a vocabulary issue, a missing specification field or a custom optical design question.
Prepare a reviewable RFQ
Send the known wavelength, blocking, geometry and quantity fields. Mark unknown values clearly so engineering review can focus on the missing decisions.
Start RFQFAQ
Common RFQ questions.
These answers keep the request focused on reviewable engineering fields.
How do I describe crosstalk in an RFQ?
List the wanted signal band, the leaking or unwanted band, adjacent channels, detector range and any current filter reference.
Can a catalog filter solve a background problem?
It depends on the wavelength ranges, blocking target, geometry and current options. Submit the fields for review instead of assuming from the family name.
Should I attach spectra?
Yes, when available. Spectra reduce ambiguity around pass-band, blocking and cutoff requirements.
Signal-path review
How this page helps prepare a clearer optical request.
This section connects the page to practical request fields, application context and engineering review steps.
Problems become review questions.
Crosstalk, background light, cutoff uncertainty and low signal are not solved by a name alone. They become questions about blocked ranges, adjacent channels and path geometry.
Problem searches become review questions.
The page turns crosstalk, low signal, cutoff and background-light concerns into practical RFQ preparation.