Konica Minolta CS-200 Chroma Meter / Luminance and Color Analyzer
| Brand | Konica Minolta |
|---|---|
| Origin | Japan |
| Model | CS-200 |
| Measurement Angles | 1° / 0.2° / 0.1° |
| Luminance Range | 0.01–20,000,000 cd/m² (at 0.1°) |
| Accuracy (Lv) | ±2% ±1 digit (≥10 cd/m², Source A, slow mode) |
| Accuracy (xy) | ±0.003 (≥10 cd/m², Source A, slow mode) |
| Repeatability (Lv) | ±0.1% ±1 digit (2–200,000 cd/m², 2σ, auto mode) |
| Spectral Method | Grating + Linear Photodiode Array |
| Minimum Measured Area | 0.1 mm (with close-up lens) |
| Interface | USB 1.1 |
| Power | AC adapter or 4× AA batteries (~3 h continuous operation) |
| Dimensions | 95 × 127 × 330 mm |
| Weight | 1.8 kg (body only) |
Overview
The Konica Minolta CS-200 is a high-precision chroma meter engineered for simultaneous luminance and chromaticity measurement of emissive surfaces and light sources. Unlike conventional tristimulus colorimeters, the CS-200 employs an advanced spectral fitting methodology—based on a 40-channel photodetector array coupled with a precision diffraction grating—to emulate the spectral responsivity of the CIE 1931 standard observer. This architecture enables XYZ tristimulus value computation with accuracy approaching that of laboratory-grade spectroradiometers, while retaining the operational simplicity, portability, and cost-efficiency characteristic of tristimulus instruments. The device operates on the principle of spectral radiance analysis: incident light is dispersed via a fixed grating, then resolved by a linear photodiode array whose individual channels are weighted to match the CIE photopic luminosity function (V(λ)) and color matching functions (x̄(λ), ȳ(λ), z̄(λ)). This ensures traceable, photometrically rigorous measurements compliant with CIE S 014-1/E:2022 and ISO/CIE 11664-1:2019.
Key Features
- Three interchangeable field-of-view angles (1°, 0.2°, 0.1°) for flexible spatial resolution—enabling precise evaluation of both large-area displays (e.g., OLED TVs) and micro-scale emitters (e.g., automotive instrument cluster LEDs).
- Ultra-wide dynamic luminance range: 0.01 cd/m² to 20,000,000 cd/m² (at 0.1°), supporting low-light validation of night-mode interfaces and high-brightness assessment of outdoor signage and HDR displays.
- Spectral reconstruction engine with 40 optimized sensor channels, delivering XYZ values with xy chromaticity uncertainty as low as ±0.003 (for Lv ≥10 cd/m², Source A, slow averaging mode), per Konica Minolta’s internal calibration protocol traceable to NMIJ (National Metrology Institute of Japan).
- Seven selectable measurement speeds—from 0.5 s (ultra-fast) to 12 s (ultra-slow)—with automatic exposure control and configurable averaging (2σ to 8σ statistical confidence levels).
- Real-time synchronization capability: vertical sync input (40.00–200.00 Hz) permits frame-locked acquisition for flicker-sensitive applications such as LCD response time verification and PWM-driven LED characterization.
- Integrated backlit LCD interface with intuitive navigation; onboard memory stores up to 101 sample readings (9-character ID) and 20 reference standards; user-defined calibration available across 20 independent channels.
Sample Compatibility & Compliance
The CS-200 is validated for direct measurement of self-luminous devices without auxiliary optics or external filters. It supports full compliance testing for display manufacturing per ISO 9241-307 (Ergonomics of human-system interaction — Part 307: Analysis of surface and ambient light), IEC 62341-6-2 (OLED displays — Optical measurement methods), and JEITA CP-3407 (LCD module optical characteristics). Its spectral fidelity satisfies the requirements for photometric validation in GLP-regulated R&D environments where instrument traceability to national standards (e.g., JCSS-certified calibration) is mandated. While not FDA 21 CFR Part 11–compliant out-of-the-box, audit-ready data export (CSV, TXT) and optional CS-S10w Professional software enable implementation of electronic signature workflows aligned with GMP Annex 11 principles.
Software & Data Management
The included CS-S10w Standard software provides real-time graphing, batch report generation, and comparative analysis against user-defined tolerances (ΔLv, Δu’v’, ΔEab). The optional CS-S10w Professional edition extends functionality with automated pass/fail flagging, SPC charting (X-bar/R, Cp/Cpk), multi-instrument fleet management, and XML-based data interchange compatible with LIMS platforms. All measurement metadata—including instrument serial number, calibration date, operator ID, ambient temperature/humidity (if logged externally), and sync frequency—is embedded in exported files. USB 1.1 communication ensures stable, low-latency data transfer without driver dependency on Windows 10/11 or macOS 12+ systems.
Applications
- Display quality assurance: luminance uniformity mapping, white point drift monitoring, and gamma curve validation across LCD, OLED, MicroLED, and PDP panels during production and aging tests.
- Automotive HMI certification: backlight intensity grading of digital instrument clusters, center-stack infotainment displays, and HUD combiner luminance under varying ambient illuminance (per UNECE R118 and SAE J1757-2).
- Signal lighting compliance: photometric verification of traffic signals, aircraft obstruction lights, and marine navigation beacons per ICAO Annex 14 and FAA AC 150/5340-30H.
- R&D of next-generation emitters: spectral stability profiling of UV-C LEDs, quantum-dot-enhanced backlights, and laser-scanned projection systems operating at extreme luminance ratios (>1,000,000:1).
- Human factors studies: mesopic luminance evaluation for night-vision-compatible cockpit interfaces and adaptive brightness algorithms in wearable AR optics.
FAQ
What calibration standards does the CS-200 support?
The instrument ships with factory calibration traceable to NMIJ (Japan) and includes a built-in zero-calibration function. External recalibration is recommended annually using Konica Minolta’s CS-200 Calibration Kit (Cat. No. 401-0011), which contains NIST-traceable luminance standards.
Can the CS-200 measure non-steady-state emissions, such as PWM-driven LEDs?
Yes—via its vertical sync input, the CS-200 can lock acquisition to display refresh cycles or LED drive frequencies between 40 Hz and 200 Hz, enabling accurate time-averaged luminance and chromaticity capture without aliasing artifacts.
Is the 0.1° measurement angle suitable for measuring micro-LED pixels?
With the optional close-up lens (CS-200 CL-1), the minimum measurable spot diameter is 0.1 mm at 296 mm working distance—sufficient for evaluating individual subpixels in high-PPI micro-LED arrays (e.g., ≥2000 PPI at 0.5 mm pitch).
Does the CS-200 meet ISO 12232:2019 for camera sensor luminance calibration?
While not explicitly certified to ISO 12232, its spectral accuracy (±0.003 in xy at 100 cd/m²) and luminance linearity (<±0.5% over 4 decades) satisfy the metrological prerequisites for use as a reference standard in imaging sensor characterization workflows.
How is measurement repeatability affected when switching from 1° to 0.1° FOV?
At 0.1°, the collected photon flux drops to ~1% of the 1° signal level; therefore, the specified repeatability (e.g., ±0.0004 in xy) applies only when sufficient integration time is used to maintain SNR >1000:1—typically requiring ≥3 s averaging for Lv <100 cd/m².
