LP785 Longpass Filter (T>85%@795-1750nm, OD5@200-775nm)

LP785 Longpass Filter (T>85%@795-1750nm, OD5@200-775nm)

Cut-on=785nm / T>85%@795-1750nm // OD5@200-775nm / dia12.5mm(unmounted)
$50.00
$50.00
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LP785 Longpass Filter (T>85%@795-1750nm, OD5@200-775nm)
  • LP785 Longpass Filter (T>85%@795-1750nm, OD5@200-775nm)
LP785 Longpass Filter (T>85%@795-1750nm, OD5@200-775nm)

LP785 Longpass Filter (T>85%@795-1750nm, OD5@200-775nm)

SO3040048
Cut-on Wavelength
Cut-on Wavelength
Cut-on=785nm
Transmission // Blocking
Transmission // Blocking
T>85%@795-1750nm // OD5@200-775nm
SO3040048n-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 LP785 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: 785 nm cut-on wavelength
  • Bandwidth / transition spec: See specification table for transition characteristics
  • Transmission / blocking: T>85% from 795-1750 nm ;  OD5 from 200-775 nm
  • Format / custom option: Available in 25.4 mm diameter and 60x60mm, mounting options
LP785 Longpass Filter - Chemical Analysis (Raman Spectroscopy)

LP785 Longpass Filter - Chemical Analysis (Raman Spectroscopy)

Chemical Analysis (Raman Spectroscopy)

This technique is used to figure out what a mystery powder, liquid, or material is made of. You shine a specific laser at the material, and the material bounces back a very faint, "color-shifted" light that acts like a chemical fingerprint. This filter is specifically designed to block the dangerously bright, blinding glare of the main laser beam while letting the faint, shifted fingerprint light pass through to the camera.

Recommended light source:

  • 785nm Diode Laser: This is the industry standard for this exact filter. The filter's cutoff is perfectly designed to block this exact laser while catching the chemical signals right next to it.
  • 785nm DPSS (Solid-State) Laser: This offers a cleaner, more stable beam than a standard diode laser, which gives a clearer, sharper chemical reading in high-end laboratory equipment.
LP785 Longpass Filter - Medical & Biological Fluorescence Imaging

LP785 Longpass Filter - Medical & Biological Fluorescence Imaging

Medical & Biological Fluorescence Imaging

Doctors and scientists use special dyes (like ICG) that glow in the dark when hit with a certain light. They inject this dye to highlight blood vessels or tumors during surgery. This filter is used on the surgical camera. It completely blocks out the bright light used to "wake up" the dye, ensuring the camera only sees the faint, invisible glowing signal coming from the tissue.

Recommended light source:

  • 740nm to 760nm LEDs: These lights are perfect for providing the energy to make the biological dyes glow. Because their wavelength is under 775nm, the filter will 100% block them from blinding the camera.
  • 785nm Lasers: Similar to LEDs, but used when the doctor needs a highly concentrated, focused beam of light to make a very specific tiny area of tissue glow.

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.