LPF620 Longpass Optical Filter | 620nm Cut-On | High Transmission >85% | For Biochemical Analyzers & Lab Equipment

LPF620 Hard-Coated Longpass Filter | 620nm Cut-On Wavelength | Optimized for Biochemical Diagnostics & Lab Instruments

Product Description:

Precision Optical Filtering for Advanced Biochemical Analysis
The LPF620 Longpass Filter is engineered to deliver exceptional spectral performance for demanding biochemical analysis applications. With a sharp cut-on edge at 620nm, this filter selectively transmits longer wavelengths while effectively blocking shorter wavelengths below 620nm. Ideal for fluorescence detection, absorbance measurement, and diagnostic instrumentation, the LPF620 ensures high signal-to-noise ratios and reliable data integrity in critical laboratory environments.

Key Features & Benefits:
✅ Sharp Cut-On Edge at 620nm
Precisely transitions from blocking to transmission near 620nm, enabling accurate spectral separation for assays and diagnostics.

✅ High Transmission (>85%) in Passband
Maximizes signal intensity across the transmitted spectrum (620–1100nm+), enhancing sensitivity in low-light applications.

✅ Deep UV/Visible Blocking (OD >4)
Effectively rejects unwanted shorter wavelengths (e.g., excitation light or background noise) to reduce interference and improve measurement accuracy.

✅ Hard-Coated Durability
Robust dielectric coatings on premium substrates (e.g., BK7 glass) ensure long-term stability, resistance to humidity, and compatibility with harsh lab environments.

✅ Low Auto-Fluorescence
Minimizes self-emission to preserve signal purity in fluorescence-based detection systems.

Designed For:

• Biochemical Analyzers & Diagnostic Equipment

• Fluorescence Spectroscopy & Microscopy

• Enzyme-Linked Immunosorbent Assays (ELISA)

• Blood Chemistry & Urinalysis Systems

• Lab Automation & High-Throughput Screening (HTS)

Technical Specifications (Typical):

• Cut-On Wavelength (CWL): 620 nm ±3nm

• Transmission @ >650nm: >85%

• Blocking Range (200–600nm): OD >4 (Transmission <0.01%)

• Substrate: Optically Polished BK7 Glass (Other materials available)

• Surface Quality: 60-40 Scratch-Dig

• LIDT: >500 mJ/cm² (Nd:YAG, 1064nm, 10ns pulse)

Why Choose Our LPF620 Filter?
Our filters are manufactured under strict ISO-controlled conditions, ensuring batch-to-batch consistency and compliance with medical device component standards. Customizable diameters (5–50mm), thicknesses, and coating enhancements (e.g., steeper edges, higher OD blocking) are available to integrate seamlessly into your instrument design.