Optics and optical instruments. Test methods for telescopic systems - Test methods for night-vision devices Ingestion-build-44680 It specifies methods for measuring

It specifies methods for measuring the sound pressure levels on a measurement surface enveloping a source

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Optics and optical instruments. Test methods for telescopic systems - Test methods for night-vision devices Ingestion-build-44680 It specifies methods for measuring1 Scope This International Standard describes the test methods for determining the performance of night vision devices as specified in ISO 21094.