LP900 Longpass Filter (T>90%@915-1100nm, OD4@200-890nm)

LP900 Longpass Filter (T>90%@915-1100nm, OD4@200-890nm)

Cut-on=900nm / T>90%@915-1100nm // OD4@200-890nm / dia12.5mm(unmounted)
$50.00
$50.00
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LP900 Longpass Filter (T>90%@915-1100nm, OD4@200-890nm)
  • LP900 Longpass Filter (T>90%@915-1100nm, OD4@200-890nm)
LP900 Longpass Filter (T>90%@915-1100nm, OD4@200-890nm)

LP900 Longpass Filter (T>90%@915-1100nm, OD4@200-890nm)

SO3040096
Cut-on Wavelength
Cut-on Wavelength
Cut-on=900nm
Transmission // Blocking
Transmission // Blocking
T>90%@915-1100nm // OD4@200-890nm
SO3040096n-d12.5u
In stock
$50.00
$50.00
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Stock Availability

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
Custom Size & Mounting

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.
Request Raw Data

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.
Shipment & Delivery

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.
Payment & Quotation

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
Import, Duties & Customs

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 LP900 longpass filter is designed to transmit wavelengths longer than the cut-on region while reducing shorter-wavelength light. It is suitable for infrared sensing, optical detection, and machine vision systems where longer-wavelength signal needs to be separated from visible or shorter-wavelength NIR background. It helps separate longer-wavelength infrared signal from shorter-wavelength background and protect detectors from unwanted radiation.

Key specifications:

  • Wavelength / main spec: 900 nm cut-on wavelength
  • Bandwidth / transition spec: See specification table for transition characteristics
  • Transmission / blocking: T>90% from 915-1100 nm ;  OD4 from 200-890 nm
  • Format / custom option: Available in 25.4 mm diameter and 60x60mm, mounting options
LP900 Longpass Filter - Laser Diode Inspection

LP900 Longpass Filter - Laser Diode Inspection

Laser Diode Inspection

Specifically used for viewing 915nm laser diodes. The filter blocks the laser's "pump" light or ambient noise, allowing the camera to see only the reflected laser light.

Recommended Light Sources

To use this filter effectively, your light source must output significant energy above 900nm. Standard white LEDs will appear completely black through this filter.

  • 915nm or 940nm LEDs: These are the ideal matched sources. The LP900 will pass nearly 100% of their output while blocking all other ambient interference. 940nm is a common "covert" IR wavelength.
  • 915nm Laser Diodes: As mentioned in applications, this is a specific target wavelength for this filter.
  • Xenon Strobes: While Xenon covers the full spectrum, it has strong IR output. The filter will cut the visible flash, leaving only the high-intensity IR pulse for the camera.
  • Halogen/Tungsten: These run hot and output massive amounts of infrared light (up to 2000nm+), making them excellent sources for LP900 applications, provided heat management is not an issue.
LP900 Longpass Filter - Forensics

LP900 Longpass Filter - Forensics

Forensics (Blood & Gunshot Residue)

When used on a camera with its IR-cut filter removed, the LP900 can reveal blood stains or gunshot residue on dark fabrics (like denim) by making the fabric appear white/reflective while the residue remains dark.

Recommended Light Sources

  • High-Intensity 940nm IR LED: 940nm is a standard infrared wavelength that sits perfectly inside the LP900’s transmission window (T>90%).
  • Halogen or Tungsten Incandescent Lamp: Unlike modern white LEDs (which emit very little IR), a halogen bulb emits a massive broadband spectrum that includes deep infrared.

Similar Bandpass Filters

Product Faqs

Cut-on / cut-off wavelength

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

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.
Optical Density (OD)

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)

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.