OVERVIEW

Hoffman Engineering’s LM-33-80A is a compact night sky projector system. The unit is calibrated to project four preset levels of Night Sky Illumination (Full Moon, Quarter Moon, Starlight and Overcast).

The unit also has an additional “USER” position that allows for custom levels to be set for unique testing requirements. Internal filters provide a close match to the Spectral Energy Distribution of the Night Sky Spectra. The systems lightweight, compact format makes it an invaluable tool for NVIS evaluations and training. The LM-33-80A, when used with our LM-33-402M (USAF 1951 Medium Resolution Bar Chart), is the ideal choice when performing the MIL-STD-3009 System Level Visual Acuity Test. Calibration Data is supplied in both NVIS Irradiance and NVIS Lux.

NSN: 6920-01-534-7288

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The PCS-600 system provides the user with a completely self contained photometric calibration system that is highly accurate and requires a minimum of training for proper use.

The PCS-600 is a high stability silicon detector based calibration system for the absolute value of illuminance. The system is capable of calibrating light meters used for incident light measurements in the units of Footcandles or Lux. For more information please contact a Hoffman Representative.

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Hoffman Engineering has developed a series of portable, battery operated, silicon Photometers/Radiometers with precision ranges and sensitivity to measure night sky illuminance in both the visible and night vision spectrums identify as ANV-410B and TSP-410, these instruments are designed for use in the field to measure ambient illuminance and assist in NVD mission planning.

The TSP-410 is photopically filtered and calibrated to measure and display in Lux. The ANV-410A is filtered and calibrated to match the Class ‘A’ response identified in MIL-L-85762A. The ANV-410B is filtered and calibrated to match the Class ‘B; response identified in MIL-L-85762A. The ANV-410x series radiometers calibrated to and display units in what can be characterized as NVIS Lux. All three instruments operate on four (4) decade ranges of amplification with selection controlled by the front panel range switch. A cover is provided for the detector, permitting the user to zero/null the instrument prior to use.

NSN: 6695-01-478-9415

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The LS-65-GF is a 6-inch integrating sphere with a 1.5mm layer of BaSO4 coating pumped by a high-stability quartz lamp.

The lamp is mounted in a housing which provides both shielding of the lamp to prevent stray light and heat sinking to protect the operator. The lamp housing contains a precision adjuster that controls the amount of light entering the sphere. The flux field at the exit port of the sphere is uniform and independent of the field of view. The exit port is approximately 45mm in diameter, and comes with a seal to avoid contamination of the coating when not in use.

OVERVIEW

The LS-65-GS is a 6-inch integrating sphere with a 1.5mm layer of BaSO4 coating pumped by a high-stability quartz lamp.

The lamp is mounted in a housing which provides both shielding of the lamp to prevent stray light and heat sinking to protect the operator. Under the lamp housing is a micrometer-driven aperture controls the amount of light entering the sphere. The flux field at the exit port of the sphere is highly uniform and independent of the field of view. The exit port is approximately 45mm in diameter, and comes with a cover to avoid contamination of the coating when not in use.

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OVERVIEW

Hoffman Engineering’s LS-65-8E is a self-contained Calibration Standard for Luminance, Radiance, and Correlated Colour Temperature.

This microprocessor-controlled instrument offers precise control of luminance from 0 to 2000 footlamberts and correlated colour temperature from 1800 to 3100 Kelvins. As with all Hoffman products, this unique design offers N.I.S.T. traceability. Our temperature-stabilized detector array assures high precision in fluctuating ambient environments. The micrometer-driven aperture provides precise linear control of luminance levels without affecting colour temperature.

NSN: 6695-01-627-2272

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The NVG Lighting Conformity Test Kit (HEC p/n LM-33-550) provides the equipment components, processes, and procedures for testing NVG modified cockpits. It provides standardized components for repeatable test results to ensure compliance with regulatory guidance in the Instructions for Continued Airworthiness of a NVG Lighting Original Equipment Manufacturer (OEM).

NSN: 6920-01-608-0636

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Hoffman’s NVG-105 Light Leak Filter Kit is an easy solution for converting your existing ANVIS-6, ANVIS-9 or F-4949 Night Vision Goggles into an Inspection Scope for light leak checks.

In the event of a failure to pass the NVG Conformity Test, Inspection Scopes are a required tool for identifying light leaks per DO-275. The NVG-105 utilizes a precise filter that allows the user to identify non-compliant devices that would decrease night vision goggle visual acuity. The kit is an easy to use, cost-effective way to evaluate a crew station lighting to ensure flight safety.

Ideal scenarios for NVG-105 use include:

• Preflight inspection
• Recurring inspections
• Evaluation of newly installed instruments
• Evaluation after instruments have been serviced and/or repaired
• Local protocol for aircraft inspection

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The ANV-060 is a simple low cost system designed to provide users the ability to verify proper operation of the AN/AVS-9 and AN/AVS-6 Battery Circuits.

This test set uses standard goggle component interfaces making the system easy to use and assure accurate electrical assessment. The system streamlines the required preventative maintenance checks and service of helmet mount assemblies while eliminating possible electrical or physical damage to the assemblies during testing. The system will evaluate HGU-55/P helmet mount assemblies used with F4949 Night Vision Goggle models C, D, G & L. The standard ‘AA’ battery cartridge allows the system to evaluate SPH-4AF helmet battery packs used with F4949 models F & H and AN/AVS-6. The system requires annual calibration done by Hoffman Engineering’s NIST traceable laboratory and complies with the testing requirements called out in Air Force TO-12S10-2AVS9-2 and Navy NAVAIR-16-35AVS9-2.

A U.S. State Department export license is required for all international sales

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Hoffman Engineering, the recognized leader in the design and manufacture of Night Vision Device test and maintenance equipment, introduces a unique new test clip to verify Helmet Mount battery circuit continuity.

The ANV-055 is a simple, low-cost system designed to provide maintainers of Night Vision Devices with the ability to verify proper operation of the AN/AVS-9 and AN/AVS-6 Battery Circuits without the use of test probes and a multimeter. This test clip uses standard goggle component interfaces making the system easy to use and assuring accurate electrical continuity assessment. The system streamlines the required preventative maintenance checks and service of helmet mount assemblies. The ANV-055 will evaluate all mounts in which standard ANVIS helmet mount assemblies are used. The Battery Circuit Continuity Tester requires no annual calibration and complies with the testing requirements for 90 and 180-day checks.

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