LP900 Longpass Filter (T>85%@910-1750nm, OD5@200-890nm)

LP900 Longpass Filter (T>85%@910-1750nm, OD5@200-890nm)

Cut-on=900nm / T>85%@910-1750nm // OD5@200-890nm / dia12.5mm(unmounted)
$50.00
$50.00
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LP900 Longpass Filter (T>85%@910-1750nm, OD5@200-890nm)
  • LP900 Longpass Filter (T>85%@910-1750nm, OD5@200-890nm)
LP900 Longpass Filter (T>85%@910-1750nm, OD5@200-890nm)

LP900 Longpass Filter (T>85%@910-1750nm, OD5@200-890nm)

SO3040057
Cut-on Wavelength
Cut-on Wavelength
Cut-on=900nm
Transmission // Blocking
Transmission // Blocking
T>85%@910-1750nm // OD5@200-890nm
SO3040057-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>85% from 910-1750 nm ;  OD5 from 200-890 nm
  • Format / custom option: Available in 25.4 mm diameter and 60x60mm, mounting options
LP900 Longpass Filter - SWIR Machine Vision and Inspection

LP900 Longpass Filter - SWIR Machine Vision and Inspection

SWIR Machine Vision and Inspection

This involves using special cameras on factory lines to see things that regular visible light cannot reveal. Because this filter lets Short-Wave Infrared (SWIR) light pass through while blocking all normal room light, it allows cameras to see through opaque plastic packaging to check liquid levels, spot invisible bruises on agricultural crops, or even look "inside" silicon computer chips for defects.

Recommended light source:

  • Tungsten-Halogen light source: It naturally produces a massive amount of broad-spectrum infrared heat and light, making it a great, cost-effective way to illuminate objects so the camera can easily detect moisture or chemical differences.
  • SWIR LED (e.g., 1050nm or 1300nm) light source: These are very energy-efficient, don't burn hot like halogen bulbs, and can be flashed on and off rapidly, which is perfect for capturing clear images on high-speed conveyor belts.
LP900 Longpass Filter - Covert Security and Night Vision

LP900 Longpass Filter - Covert Security and Night Vision

Covert Security and Night Vision

Security cameras often need to monitor areas in pitch darkness without alerting anyone. By shining an invisible infrared light onto a scene and placing this filter over the camera lens, the camera can see perfectly in the dark. The filter also completely blocks out distracting glare from visible lights, like streetlamps or car headlights.

Recommended light source:

  • 940nm LED light source: This wavelength of light is completely invisible to the human eye (so no one knows they are being recorded), but it passes easily through your filter for the camera to see.
  • 1064nm Infrared Laser light source: This provides a highly focused, intense beam of invisible light, making it the best choice for illuminating objects at extremely long distances where standard LEDs would be too weak.

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.