LP785 Longpass Filter (T>85%@795-1750nm, OD5@200-775nm)
LP785 Longpass Filter (T>85%@795-1750nm, OD5@200-775nm)
In Stock.
Ships within 5 working days of order. Customs handling including. (DDP)
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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
Request Raw Data
Request Raw Data
You can request the raw transmission data from us.
Copy the link of the product page and send email to shop@syronoptics.com, you will get reply within 1 working days.
Shipment & Delivery
Shipment & Delivery
- Stocked products ship within 5 business days after order confirmation.
- Custom-made products typically ship within 4–8 weeks.
- Delivery times may be affected by holidays, customs clearance, or other unforeseen events.
- Tracking information becomes available 3–5 days after dispatch when the parcel is handed to the local courier.
- Some deliveries may require customer pickup. Please ensure your contact information is correct and respond promptly to courier communications.
- General international parcel shipping cost: USD 35 (for reference).
Return & Refund
Return & Refund
1. Eligible Products
Stocked (catalog) products with a unit price under USD 500 are eligible for return within 14 days after delivery.
Custom-made or non-stock items are not eligible for no-reason returns.
2. No-Reason Return (Buyer’s Remorse)
If you wish to return an item for reasons other than product defect or seller error:
- Please email shop@syronoptics.com to request a return authorization and return address.
- Buyer is responsible for all return shipping costs.
- Items must be unused, in original condition, and with original packaging.
- Refund will be issued after inspection of the returned item.
3. Seller’s Fault (Defective / Wrong / Damaged Item)
If the return is due to seller error (defective product, wrong item shipped, or damage during shipping):
Please provide clear evidence (photos or videos) showing the issue.
We will evaluate the case and either:
- Provide a replacement, or
Issue a refund (with or without requiring the item to be returned). - Return shipping cost will be covered by the seller in confirmed seller-fault cases.
4. Important Notes
- Returned items are subject to inspection before refund approval.
- Shipping fees, customs duties, and taxes are non-refundable unless the return is due to seller fault.
- Unauthorized returns will not be accepted.
Payment Terms
Payment Terms
Payments can be made online using Credit Card, Apple Pay, Google Pay, WeChat Pay, and Alipay.
If you prefer to pay by bank transfer, please contact shop@syronoptics.com to request an invoice with our banking details.
If you require deferred payment terms, you may request NET 7 or NET 30 at the time of placing your order.
All requests for deferred payment are subject to approval and will be confirmed by SyronOptics via email.
Custom Sizing
Custom Sizing
Custom sizing is available from 3 × 3 mm (or Ø5 mm) up to 60 × 60 mm. For custom cut sizes, please contact shop@syronoptics.com for a quotation.
Pricing is not significantly lower for small-size orders in low quantities due to operational costs.
SKU:SO3040048n-d12.5u
View full details
| Specifications | |
|---|---|
Cut-On Wavelength |
785nm
|
Optical Density |
OD5
|
Part Number |
SO3040048
|
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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.
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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.
