LP940 롱패스 필터(T>85%@950-1100nm, OD2@350-930nm)
LP940 롱패스 필터(T>85%@950-1100nm, OD2@350-930nm)
In Stock.
Ships within 5 working days of order.
픽업 사용 가능 여부를 로드할 수 없습니다.
- 파장: LP940 롱패스 필터는 950~1100nm의 근적외선(NIR) 응용 분야에 최적화되어 있습니다.
- 분광 특성: 940nm에서 날카로운 차단 특성을 보이며 950nm 이상에서 85% 이상의 투과율을 제공하여 안정적인 신호 선명도를 보장합니다.
- 광학 밀도: 350~930nm 범위에서 OD2 차단 기능으로 더 짧은 파장의 빛을 효과적으로 차단합니다.
- 필터 크기: 다양한 크기를 제공합니다. 맞춤형 크기 및 장착 옵션에 대해서는 당사에 문의하십시오.
전송 및 OD 데이터
전송 및 OD 데이터
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.
배송 및 배달
배송 및 배달
- 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).
반품 및 환불
반품 및 환불
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.
지불 통지
지불 통지
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.
사용자 정의 크기
사용자 정의 크기
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(재고 관리 코드):lp360-d12.5
전체 세부 정보 보기
| Specifications | |
|---|---|
Cut-On Wavelength |
940nm
|
Optical Density |
오디2
|
Part Number |
SO3040075
|
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LP940 Longpass Filter - Covert Surveillance & Security
Covert Surveillance & Security
This is the most common use. The 940nm wavelength is completely invisible to the human eye (unlike 850nm, which has a faint red glow). Cameras equipped with this filter can capture images in total darkness without alerting subjects.
Recommended Light Sources
To maximize the efficiency of an LP940 filter, you must use a light source that matches its transmission band (950nm-1100nm).
- 940nm IR LEDs:Why: These are the optimal match. They emit a narrow band of light centered at 940nm, which passes through the filter with >85% transmission.Benefit: They are "covert" (no visible red glow) and highly efficient for this specific filter.
- Broadband IR Illuminators:Why: Tungsten-halogen lamps or broad-spectrum IR arrays will work, but the filter will waste a significant portion of their energy (blocking everything below 930nm).Use Case: Only use these if you need a very high intensity that LEDs cannot provide, and heat generation is not a concern.
- 850nm LEDs (NOT Recommended):Why: The LP940 filter has an Optical Density of 2 (blocking 99% of light) up to 930nm. It would block the light from an 850nm LED, rendering the image black.
-
LP940 Longpass Filter - Moisture Detection
Moisture Detection
Water absorbs light significantly around the 940nm-970nm range. By using this filter, water or moisture appears dark or high-contrast against other materials, making it ideal for inspecting fruit quality, checking fill levels in opaque containers, or detecting leaks in fabrics.
Recommended Light Sources
- 970nm / 980nm High-Power LED
- Why it works:Maximum Contrast: Water has a distinct absorption peak at 970nm. Illuminating at this specific wavelength causes water to appear darkest (absorbing the light) while other materials reflect it (appearing bright).Filter Compatibility: These wavelengths (970-980nm) are well above the 940nm cut-on of your filter, ensuring 100% transmission to the camera.
- Form Factor:
- Backlight (for liquids): Use a flat LED backlight behind the container. The liquid will appear black against a bright white background.
- Diffuse Front Light (for fruit/fabrics): Use a ring light or bar light to illuminate the surface. Bruises (high water content) or wet spots will appear as dark patches.
- Broadband Halogen / Tungsten Light
- Why: These emit a continuous spectrum including the 970nm-1100nm range.
- Pros: Easy to source; covers all NIR absorption bands (including higher ones like 1450nm if the camera supports it).
- Cons: Generates significant heat; less energy efficient than LEDs.
