LP390 Longpass Filter (T>85%@400-2000nm, OD5@200-380nm)

Cut-on=390nm / T>85%@400-2000nm // OD5@200-380nm / dia12.5mm(mounted)

$55.00

LP390 Longpass Filter (T>85%@400-2000nm, OD5@200-380nm)

SO3040010

Cut-on Wavelength

Cut-on=390nm

Transmission // Blocking

T>85%@400-2000nm // OD5@200-380nm

Dimension

SO3040010-d12.5mt

In stock

$55.00

Yes. Listed filters are generally available from stock, but final availability may depend on size and quantity.

Most filters are kept as medium-sized coated pieces
Final size is usually diced before shipment
Preparation time may vary for urgent orders, custom sizes, or larger quantities

We can usually cut optical filters to custom outer sizes, depending on available coated material.

Custom size

Typical custom size range: 3 × 3mm to 60 × 60mm
Custom sizing changes the outer dimension only
Thickness normally follows the original filter specification
Final feasibility depends on coated material size and cutting requirements

Mounting

Standard mounting options are
dia12.5mm (mounted) - OD = dia12.5mm,Thickness=3.5mm,No Thread
dia25mm (mounted) - OD = dia25mm,Thickness=3.5mm,No Thread
Mounted options can include non-threaded or threaded mounts
Custom mounting may be possible depending on quantity and mechanical requirements

Note

Please send the required size, quantity, mounting type, and product link before ordering.

Yes. You may request the transmission curve or related spectral data for engineering review.

Copy the link of the product page and send email to shop@syronoptics.com, you will get reply within 1 working days.

We ship optical products to most supported regions, with shipping cost and delivery method confirmed before payment.

Shipping cost

Shipping is generally USD 5–40 per parcel
Orders above USD 300 are eligible for free shipping
Final cost depends on destination, package size, order value, and shipping method
Shipping cost is shown during checkout or confirmed before payment

Shipping coverage

We generally ship to Europe, North America, Asia, the Middle East, and Oceania
Some countries may be unavailable depending on logistics or customs conditions

Delivery time

Most stocked products need 1–5 working days for preparation before shipment
After shipment, delivery time depends on destination and shipping method
Tracking information will be provided when available

Note

If your destination is not available during checkout, please contact us before ordering.

You can order online, request a quotation, or use bank transfer depending on your purchasing process.

Can I request a quotation before ordering?

Yes, formal quotations are available before payment
Recommended for company purchases, larger quantities, custom sizes, or special shipping requirements
Please send the product link, quantity, destination country, and billing details if available

What online payment methods are available?

Credit card
Apple Pay
Google Pay

Do you support bank transfer?

Yes, bank transfer is available
We support multi-currency payment through local banking where available
Local receiving accounts may include US, UK, Germany, Singapore, and Hong Kong bank accounts
For payment in Chinese RMB inside Mainland China, please contact our local partner
VAT fapiao may be supported for eligible Mainland China transactions

Do you support company purchase orders?

Company purchase orders may be supported after confirmation
Please contact us before ordering if your organization requires PO processing, quotation, or invoice matching

Are NET payment terms available? (Pay after received)

NET 7 or NET 30 terms may be available for eligible organizations
Approval depends on company type, order value, payment history, and internal review
Please contact us before ordering if you need NET payment terms

mport duties, taxes, and customs handling depend on your destination country and shipping method.

Are duties and taxes included?

For express courier services such as DHL or FedEx, duties, taxes, and customs handling are usually paid by the buyer
The final import cost depends on destination country, declared value, and local customs rules
Duties and taxes are not included unless clearly confirmed before payment

Can SyronOptics help with import clearance?

Import-handled delivery may be available for selected regions
Supported regions may include USA, Canada, United Kingdom,Europe, Mainland China, Hong Kong, Singapore, Australia, and New Zealand
With import-handled delivery, we help arrange clearance and local delivery
This option may be slower than express courier

Note

If you are not sure, please contact us to confirm whether import-handled delivery is supported in your region.

This LP390 longpass filter is designed to transmit wavelengths longer than the cut-on region while reducing shorter-wavelength UV light. It is suitable for fluorescence imaging, optical sensing, and detector protection systems where longer-wavelength signal needs to be separated from UV excitation or short-wavelength background. It helps reduce unwanted UV light while preserving the longer-wavelength signal for measurement or imaging.

Key specifications:

Wavelength / main spec: 390 nm cut-on wavelength
Bandwidth / transition spec: See specification table for transition characteristics
Transmission / blocking: T>85% from 400-2000 nm ; OD5 from 200-380 nm
Format / custom option: Available in 25.4 mm diameter and 60x60mm, mounting options

Specifications for product LP390 Longpass Filter (T>85%@400-2000nm, OD5@200-380nm)
Specifications
Cut-On Wavelength	390nm
Optical Density	OD5
Part Number	SO3040010

Similar Bandpass Filters

Product Faqs

Cut-on / cut-off wavelength is the transition point where an edgepass filter starts or stops transmitting light; in a practical system, it defines which wavelength range is allowed through and which range is reduced or blocked.

Blocking region is the wavelength range where the filter is designed to suppress unwanted light; in a practical system, stronger or wider blocking helps reduce background signal, stray light, and detector interference.

Blocking depth / optical density (OD) describes how strongly unwanted light is suppressed in the blocking region; for example, OD6 @ 200–1200nm means the filter is designed to block wavelengths from 200–1200nm to about 0.0001% transmission, helping reduce stray light, background signal, and detector overload.

Angle of incidence (AOI) is the angle at which light hits the filter surface; as AOI increases, interference filters can show a spectral shift, usually moving the transmission or transition wavelength toward shorter wavelengths.

Need Help Confirming This Filter?

Whether you are replacing an existing part or building a new system, send us:
- Original part number or target specification
- Required size and quantity
- Application or system goal

We will help check product fit or suggest a stock/custom alternative.