Find-R-Scope® IRV84499C Portable Near-Infrared Image Intensifier

Overview

The Find-R-Scope® IRV84499C is a self-contained, handheld near-infrared (NIR) image intensifier engineered for high-fidelity visualization in the 350–1350 nm spectral range. Unlike thermal imaging systems that detect long-wave infrared (LWIR) radiation emitted by objects, this device operates on the principle of photon amplification via a microchannel plate (MCP) intensifier tube—enabling real-time observation of reflected or actively illuminated NIR radiation. It is optimized for applications requiring detection of covert illumination sources (e.g., 850 nm and 1350 nm LEDs), laser alignment verification, and non-destructive inspection where visible-light obscuration or low ambient conditions preclude conventional optical methods. Its design adheres to rigorous electro-optical engineering standards, integrating a high-transmission f/1.6 objective lens, integrated visible-light cutoff filtering, and low-noise high-voltage power regulation—all within a compact, field-deployable form factor.

Key Features

• Monocular, battery-powered NIR viewer with 24° field of view and 1× native magnification (using standard 25 mm f/1.6 lens)
• Spectral response: 350–1350 nm (standard configuration); peak quantum efficiency at ~800 nm and ~350 nm
• Integrated IRVLP830 visible-light blocking filter (OD >5 at 400–650 nm) for enhanced signal-to-noise ratio
• Ultra-low power consumption: >98 hours continuous operation on a single AA alkaline cell; total power supply lifetime exceeds 2500 hours
• Lightweight magnesium alloy housing: 590 g (21 oz), ergonomic grip, tripod mount (¼”-20 thread), and ruggedized carrying case with molded foam interior
• Optical interface supports interchangeable lenses—including optional 50 mm f/1.8 (2× magnification), IRVCU400 close-up lens (min. working distance: 203 mm), and boost adapter rings for extended focal flexibility
• Operating temperature range: –32 °C to +46 °C (–25 °F to +115 °F); compliant with MIL-STD-810G environmental robustness guidelines for shock, vibration, and humidity

Sample Compatibility & Compliance

The IRV84499C is compatible with a broad class of NIR-emitting and reflecting samples without sample preparation or coupling media. It is routinely deployed in settings governed by ISO/IEC 17025-accredited laboratories, FAA Advisory Circular AC 25.1309-1 (for avionics panel illumination validation), ASTM E2533-22 (standard practice for NIR imaging in forensic document examination), and FDA-recommended protocols for non-invasive optical inspection in clinical and biotech environments. All units undergo factory calibration against traceable NIST-standard NIR LED sources (e.g., 400 µW @ 1350 nm at 2.4 m), with documented sensitivity verification included in shipment documentation. The device does not require software-based calibration and maintains stable gain characteristics across its operational temperature range—supporting GLP-compliant audit trails when used in regulated QC workflows.

Software & Data Management

As a purely analog optical-electronic viewing instrument, the IRV84499C does not incorporate onboard digital processing or firmware. However, it features a standardized C-mount interface enabling seamless integration with third-party video capture systems—including USB 3.0 machine vision cameras, HDMI-enabled recording modules, and scientific-grade CCD/CMOS sensors. Optional accessories include IRV-Video Interface Kits supporting real-time analog video output (composite NTSC/PAL) and time-stamped frame logging. When paired with validated acquisition software (e.g., LabVIEW-compatible drivers or open-source OpenCV pipelines), the system supports metadata-embedded image archiving compliant with 21 CFR Part 11 requirements—provided external hardware enforces user authentication, electronic signatures, and immutable audit logs.

Applications

• Verification and alignment of NIR laser diodes (808 nm, 850 nm, 940 nm, 1064 nm, 1350 nm) in R&D and production test benches
• Inspection of fiber optic connectors and waveguide integrity under NIR illumination (including identification of microbends and cladding defects)
• Forensic analysis of altered documents, ink differentiation, and underwriting recovery in legal and archival contexts
• Non-invasive assessment of pigment layering and substrate degradation in fine art conservation
• Aviation maintenance: validation of LED cockpit lighting uniformity, NVIS compatibility, and dark-adapted panel readability testing
• Biological research: monitoring NIR-fluorescent probes (e.g., ICG, Cy7 derivatives) in ex vivo tissue models and small-animal imaging setups
• Field-based ecological observation of nocturnal fauna without disruptive visible illumination

FAQ

What is the minimum detectable irradiance level for the IRV84499C?

The device achieves reliable visual detection of a 400 µW 1350 nm LED source at a distance of 2.4 meters under controlled ambient conditions—corresponding to an approximate irradiance threshold of 22 nW/cm² at the objective aperture. Actual performance varies with background radiance, lens configuration, and observer adaptation state.
Can the IRV84499C be used with active NIR illumination sources above 1350 nm?

No—the standard IRV84499C tube has negligible quantum efficiency beyond 1350 nm. For 1550 nm operation, the IRV84499C-5 variant must be specified; it uses a specialized GaAs photocathode with extended red response and is calibrated to 400 µW @ 1550 nm at 2 meters.
Is the device suitable for quantitative radiometric measurement?

No—it is a qualitative and semi-quantitative imaging tool. While relative intensity comparisons are possible, absolute irradiance or radiance values require external calibrated photodetectors (e.g., NIST-traceable thermopile sensors) and cannot be derived from viewer output alone.
Does the IRV84499C comply with export control regulations?

Yes—the device falls under ECCN 6A003.b.4.a (image intensifiers with resolution ≥ 40 lp/mm and spectral response beyond 900 nm). Export outside the U.S. requires appropriate BIS licensing per EAR §742.15. Documentation and end-use statements are provided upon request.
What is the warranty coverage and service support structure?

The IRV84499C includes a 12-month limited warranty covering material and workmanship defects. Extended service contracts, factory recalibration, and MCP tube replacement services are available through authorized U.S.-based service centers accredited to ISO 9001:2015. Field repair kits and technical bulletins are accessible via secure portal login for registered institutional users.