LP740 Longpass Filter (T>95%@740-1000nm, OD5@200-725nm)

LP740 Longpass Filter (T>95%@740-1000nm, OD5@200-725nm)

Cut-on = 740nm / T>95%@740-1000nm // OD5@200-725nm / dia12.5mm(unmounted)
$50.00
$50.00
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LP740 Longpass Filter (T>95%@740-1000nm, OD5@200-725nm)
  • LP740 Longpass Filter (T>95%@740-1000nm, OD5@200-725nm)
LP740 Longpass Filter (T>95%@740-1000nm, OD5@200-725nm)

LP740 Longpass Filter (T>95%@740-1000nm, OD5@200-725nm)

SO3040083
Cut-on Wavelength
Cut-on Wavelength
Cut-on = 740nm
Transmission // Blocking
Transmission // Blocking
T>95%@740-1000nm // OD5@200-725nm
SO3040083-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 LP740 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: 740 nm cut-on wavelength
  • Bandwidth / transition spec: See specification table for transition characteristics
  • Transmission / blocking: T>95% from 740-1000 nm ;  OD5 from 200-725 nm
  • Format / custom option: Available in 25.4 mm diameter and 60x60mm, mounting options
LP740 Longpass Filter - Near-Infrared (NIR) Fluorescence Imaging

LP740 Longpass Filter - Near-Infrared (NIR) Fluorescence Imaging

Near-Infrared (NIR) Fluorescence Imaging

This is used in medical and biological research to see special glowing dyes (often used to highlight blood vessels or specific cells). You shine a light to "excite" the dye, and the dye glows back in near-infrared. The LP740 filter acts as a shield for the camera—it blocks the bright excitation light but lets the faint glowing infrared signal pass through perfectly so you can get a crisp, high-contrast image.

Recommended light source:

  • 660nm to 710nm Red/NIR LEDs: These provide bright, even illumination to make the dyes glow. Because their wavelength is below 725nm, your filter will block 99.999% of this light from hitting the camera sensor, preventing glare.,
  • 680nm Red Lasers: These provide an incredibly intense, highly focused beam of light ideal for high-resolution microscopes. The filter easily blocks the harsh laser light while capturing the glow.

LP740 Longpass Filter - Covert Security and Night Vision

Covert Security and Night Vision

This is used for security cameras, traffic cameras, or wildlife cameras that need to see clearly in the dark without using a visible spotlight. The LP740 filter blocks out messy visible light from the environment (like streetlamps or passing car headlights) so the camera only records the pure infrared image you are illuminating.

Recommended light source:

  • 850nm Infrared (IR) LEDs: These are very common and affordable. The light passes almost perfectly (over 95% transmission) through your filter, providing clear night vision with only a tiny, barely noticeable red glow on the bulb.
  • 940nm Infrared (IR) LEDs: These are completely invisible to the human eye (no red glow at all), making them perfect for hidden cameras. The light still easily passes through your filter's 740-1000nm "window."

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.