How to Read Optical Inspection Equipment Spec Sheets? 8 Core Parameters to Avoid Pitfalls

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APEXE 2026-06-15 21 12

Data on equipment procurement spec sheets is often complex, and sales pitches can be misleading:

Is the listed resolution of 0.1 nm vertical or horizontal?
Does "1 second speed" refer to single-shot imaging or stitched results?
Is the 50mm×50mm measurement range the true effective area or just a theoretical value?
This guide breaks down 8 core parameters to help you decode spec sheets with confidence.

Definition: The minimum distinguishable step height along the Z-axis (height direction).Common Pitfalls:

Marking "0.1 nm resolution" without specifying vertical vs. horizontal.
A 0.1 nm vertical resolution ≠ 0.1 nm horizontal resolution.
Horizontal resolution is typically in the micrometer range.
How to Read Correctly:
✅ Clear specification: Vertical resolution 0.5 nm (R300)
⚠️ Red flag: "0.1 nm resolution" (ask for clarification on axis)

Definition: Time required for a single complete measurement.Common Pitfalls:

Listing "1 second speed" without clarifying single-shot vs. stitched results.
Scanning systems advertised as "high-speed" but taking several seconds per FOV.
Massive discrepancy between stitched and single-view speeds.
How to Read Correctly:
✅ Clear specification: Single-shot imaging time 1 second (R300)
⚠️ Red flag: "1 second speed" (confirm if it is single-shot)

Definition: The effective area covered in a single measurement.Common Pitfalls:

Stating a 100mm×100mm range but only the central 50% is truly usable.
Edge regions often suffer from significant accuracy degradation.
How to Read Correctly:
✅ Clear specification: Effective measurement range 50mm×50mm (edge accuracy ≥ 90%)
⚠️ Red flag: "100mm×100mm range" (confirm effective usable area)

Definition: Deviation in results when measuring the same sample multiple times.Common Pitfalls:

Repeatability measured under ideal lab conditions, not representative of real industrial use.
"0.01 nm repeatability" in specs but up to 1 nm deviation in practice.
How to Read Correctly:
✅ Clear specification: Repeatability 0.5 nm (under industrial field conditions)
⚠️ Red flag: "0.01 nm repeatability" (confirm test environment)

Definition: Distance between the objective lens and the sample surface.Common Pitfalls:

Too-short working distance (e.g., 10mm) makes industrial operation difficult.
Fixture and workpiece height requirements may demand longer clearances.
How to Read Correctly:
✅ Clear specification: Working distance 15mm, ideal for industrial handling (R300)
⚠️ Red flag: "5mm working distance" (verify compatibility with your fixtures)

Definition: The area covered by a single camera view.Common Pitfalls:

Larger FOV often comes at the cost of reduced horizontal resolution.
Advertised large FOV specs without disclosing the associated resolution drop.
How to Read Correctly:
✅ Clear specification: FOV 10mm×10mm @ 0.5μm resolution
⚠️ Red flag: "20mm×20mm FOV" (confirm resolution at that FOV)

Definition: The variety of measurement modes the system supports.Common Pitfalls:

"5-in-1" does not mean every mode delivers top-tier accuracy.
Domestic "multi-mode" systems may underperform vs. imported single-mode tools.
How to Read Correctly:
✅ Clear specification: Supports white light interferometry, confocal microscopy (with accuracy specs listed per mode)
⚠️ Red flag: "5-in-1 multi-mode" (verify accuracy for each individual mode)

Definition: Time to respond to equipment breakdowns with on-site support.Common Pitfalls:

"24-hour service" often only includes phone support, not on-site visits.
"Global service network" from foreign brands but scarce local engineers.
How to Read Correctly:
✅ Clear specification: 48-hour on-site response, with local spare parts inventory (MCZX Qiuhao R300)
⚠️ Red flag: "24-hour service" (confirm if on-site response is included)

Parameter	Key Consideration	MCZX Qiuhao R300	Zygo
Single-Shot Speed	1 second benchmark	✅ Ultra-fast	❌ Multi-second
Effective Measurement Range	Verifiable usable area	✅	✅
Repeatability	Measured under real industrial conditions	✅	✅
Working Distance	Industrial fixture compatibility	✅ Long distance	⚠️ Moderate
Multi-Mode Support	Accuracy per mode, not just count	Single-mode focus	✅ 5-in-1
Service Response	On-site response time & local support	✅ 48-hour on-site	❌ 1–3 weeks

MCZX focuses on industrial visual precision inspection solutions, official website: http://bevs.me