Infratest Night Vision Pack is a dedicated software module within the INFRATEST® suite by HGH Infrared Systems. It is designed to test and qualify any night vision device (NVD) by replacing the subjective human eye with a high-resolution Eye-Camera. This enables objective, repeatable, and accurate measurements of key NVD parameters. The module is especially suited for maintenance applications, allowing users to distinguish between defective and operational devices.

Features

• NVD Optical Properties Testing:
  • Zero and Focus of Eyepiece: Verifies the zero position and focus range using a cross or hole target and a dioptometer.
  • Magnifying Power: Calculates the ratio between angular dimensions at the eyepiece and objective sides.
  • Field of View: Measures the angular extent of the observable scene.
  • Distortion: Evaluates image deformation across the field of view.
• Image Quality Analysis:
  • Line Spread Function (LSF) / Modulation Transfer Function (MTF): Real-time analysis using knife-edge targets.
  • Spatial Resolution: Assessed with USAF 1951 target.
  • Minimum Resolvable Contrast (MRC): Determines the lowest contrast level detectable.
  • Gain Measurement: Uses a low-light source and radiancemeter to calculate amplification.
  • Spot Defect Detection: Automatically identifies and ranks image defects based on size and location using a high-resolution camera.
• Multiple Axes Alignment:
  • Boresighting: Measures the angle between the axis of a camera and a night vision sight.
  • Goggles Axes Parallelism: Compares pinhole image positions through each axis of the goggle to ensure alignment.

Benefits

• Objective Testing: Replaces subjective human evaluation with automated, camera-based analysis.
• High Accuracy: Delivers precise measurements of optical and image quality parameters.
• Defect Detection: Identifies and classifies image defects for maintenance and quality control.
• Real-Time Feedback: Live analysis of resolution, contrast, and gain.
• Maintenance Optimization: Ideal for sorting defective vs. operational NVDs in field or lab environments.
• Comprehensive Evaluation: Covers all critical aspects of night vision device performance.
• User-Friendly Interface: Simplifies complex testing procedures with intuitive controls.
• Modular Integration: Seamlessly connects with other Infratest modules and HGH hardware.