SavvyInspector® SIL4 Scratch & Dig Lens Inspector for MIL-PRF-13830B

The SavvyInspector® model SIL-4 is the world’s first US Army-traceable scratch and dig measurement system with motorised focus, designed to measure scratches and digs on curved surfaces. The system reproduces the conditions of an in-reflection visual inspection described in ANSI/OEOSC OP1.002 “Appearance Imperfections,” Appendix C of MIL-PRF-13830B, “General specification governing the manufacture, assembly, and inspection of optical components for fire control instruments,” and in Annex A.3 of ISO 14997, the metrology standard for the new visibility notation of ISO 10110. The factory calibrated inspection head of the SavvyInspector® uses invariant illumination and detection optics, a manual tip/tilt and rotation stage, and propriety analysis software, allowing objective, repeatable, and recordable evaluation of scratch-dig surface quality on curved surfaces.

SavvyInspector® SIL-4 is a complete inspection system consisting of:

• A custom LED-based illumination assembly
• A detection assembly with a digital megapixel camera
• A motorized 70 mm z-stage for focusing to different heights
• A manual, 100 mm x-y stage
• A manual tip-tilt stage and three-jaw chuck to allow measurement of parts up to 45 mm in diameter
• Additional tooling allows parts up to 70 mm diameter
• A stand-alone computer with proprietary SavvyInspector® analysis software

Scratch/Dig Standards Supported

• MIL-PRF-13830B
• MIL-C-675C
• ANSI/OEOSC OP1.002:2017 Visibility Method
• ISO 10110/ISO 14997 Visibility Specification

Grading a Scratch with the SIL4M

Savvy Optics Inspector Lens Part Holders

Instrument Calibration – Based on US Army-Traceable Calibration Standards
The SavvyInspector® system comes from the factory with calibration files based on the most popular and respected comparison standards made by Brysen, Davidson, Jenoptik, Edmund and Thor Labs. It is the only scratch and dig measurement system capable of achieving calibrated scratch and dig measurements on curved surfaces.

SavvyInspector® Software
The SavvyInspector® operator interface is designed for easy factory-floor operation, while expanding its application in the role of “Master Inspector” for QA, QC and MRB decisions. The operator enters the inspection level required, and then uses the manual x-y stage to locate the desired defect on the real-time viewing screen. The curved part is then tilted with the manual tip-tilt stage to optimize the visibility of the imperfection of interest. Motorized focus controlled by the joystick allows easy measurement set-up.

The software reports the scratch grade or dig value automatically. The “always on” inspection mode and programmable grade bars allow the operator to get real-time feedback on whether a selected imperfection is acceptable or not with a simple visual interface. There is no subjectivity; the grade is reported, and the grade bar turns red if the imperfection is greater than the specification. When a careful review and documentation of a surface is required, the version 6.4 software provides data management tools to properly collect and file screen shots and inspection grades for each imperfection on a surface, including a summary log in CSV format for easy uploading into Excel or an inspection report. Custom calibration files can be created for specific project or customer needs by the Quality Engineer as needed.