{"id":9173,"date":"2026-07-09T17:49:04","date_gmt":"2026-07-09T09:49:04","guid":{"rendered":"https:\/\/www.ledtestsystem.com\/?p=9173"},"modified":"2026-07-09T17:49:04","modified_gmt":"2026-07-09T09:49:04","slug":"lisun-vs-labsphere-integrating-sphere-comparison-technical-specifications-and-applications-guide","status":"publish","type":"post","link":"https:\/\/ledtestsystem.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/lisun-vs-labsphere-integrating-sphere-comparison-technical-specifications-and-applications-guide\/","title":{"rendered":"LISUN VS Labsphere Integrating Sphere Comparison: Technical Specifications and Applications Guide"},"content":{"rendered":"

Technical Whitepaper: Comparative Analysis of \u30ea\u30b9\u30f3<\/a> and Labsphere \u7a4d\u5206\u7403<\/a> Systems for Precision Photometric and Radiometric Measurement<\/strong><\/p>\n

\u62bd\u8c61\u7684\u306a<\/strong>
\nIntegrating sphere systems are fundamental tools in optical metrology, enabling accurate measurement of total luminous flux, spectral power distribution, and colorimetric properties of light sources. This article provides a rigorous technical comparison between \u7a4d\u5206\u7403<\/a> systems manufactured by LISUN and Labsphere, with a specific focus on the LISUN LPCE-2 (LISUN Integrating Sphere and Spectroradiometer System). The analysis encompasses construction methodologies, spectral detection technologies, compliance with international standards, and application-specific performance across diverse industries, including automotive lighting, aerospace, medical devices, and solid-state lighting manufacturing.<\/p>\n

\n

1. Foundational Architecture: Sphere Geometry and Coating Materials<\/h3>\n

The integrating sphere is the core optical component. Both LISUN and Labsphere employ high-reflectivity coatings, but their spectral performance and durability differ in measurable terms.<\/p>\n

LISUN spheres, specifically those paired with the LPCE-2 system, typically utilize a PTFE-based (Polytetrafluoroethylene) sintered coating<\/strong> with a nominal reflectance of >96% across the 350\u20131100 nm range. The mechanical construction involves a robust aluminum alloy substrate with a wall thickness optimized to minimize deformation under ambient temperature shifts. The LPCE-2 sphere is available in diameters from 0.3 m to 2.0 m, with the 0.5 m and 1.0 m variants being the most commonly deployed for LED and general lighting applications.<\/p>\n

Labsphere spheres often employ Spectralon\u00ae<\/strong> , a proprietary diffuse reflective material with a reflectance exceeding 99% in the visible spectrum and high performance into the NIR. While Spectralon offers marginally higher absolute reflectance, it is more susceptible to contamination from volatile organic compounds (VOCs) and requires careful handling and periodic cleaning to maintain calibration integrity.<\/p>\n

From a thermal management standpoint, the LISUN LPCE-2 system integrates active cooling for the sphere wall when operating in high-power configurations (e.g., for COB LEDs or automotive headlamps), a feature less common in equivalently priced Labsphere assemblies.<\/p>\n

Table 1: Sphere Coating and Structural Comparison<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
\u30d1\u30e9\u30e1\u30fc\u30bf<\/th>\nLISUN (LPCE-2)<\/th>\nLabsphere (Standard Series)<\/th>\n<\/tr>\n<\/thead>\n
Coating Material<\/td>\nSintered PTFE<\/td>\nSpectralon\u00ae<\/td>\n<\/tr>\n
Reflectance (Visible)<\/td>\n>96%<\/td>\n>99%<\/td>\n<\/tr>\n
Substrate Material<\/td>\nAluminum Alloy (Anodized)<\/td>\nAluminum or Stainless Steel<\/td>\n<\/tr>\n
VOC Sensitivity<\/td>\n\u4f4e\u3044<\/td>\nModerate to High<\/td>\n<\/tr>\n
Max Power Handling (W)<\/td>\nUp to 500 W (with active cooling)<\/td>\nUp to 300 W (passive)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

2. Spectroradiometer and Detection Engine: CCD vs. Photodiode Array<\/h3>\n

While the sphere captures the light, the detector determines data fidelity. The LISUN LPCE-2 system is paired with a high-sensitivity CCD array spectroradiometer<\/strong> (model typically designated as LSR-2000 or similar), which provides spectral resolution down to 0.2 nm (FWHM) in the 380\u2013780 nm range. This allows for precise measurement of narrowband emissions such as those from laser diodes or phosphor-converted white LEDs.<\/p>\n

Labsphere often integrates photodiode array (PDA) or CMOC-based spectrometers<\/strong> from third-party providers (e.g., Ocean Insight or Avantes). While these offer good linearity, the spectral resolution is conventionally in the range of 1.5\u20132.5 nm, which may be insufficient for rigorous color rendering index (CRI) or TM-30 calculations in high-fidelity lighting applications.<\/p>\n

The LISUN spectroradiometer in the LPCE-2 features a built-in shutter mechanism for dark current subtraction<\/strong> and a stray light correction algorithm that reduces uncertainty below 0.3% for typical LED spectra. This is critical for the Medical Lighting Equipment<\/strong> industry, where spectral accuracy directly impacts diagnostic and therapeutic outcomes (e.g., phototherapy devices).<\/p>\n

Table 2: Spectrometer Specifications<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
\u7279\u5fb4<\/th>\nLISUN LPCE-2 Spectroradiometer<\/th>\nTypical Labsphere Solution<\/th>\n<\/tr>\n<\/thead>\n
Detector Type<\/td>\nBack-thinned CCD<\/td>\nCMOS \/ PDA<\/td>\n<\/tr>\n
Spectral Range<\/td>\n380\u2013780 nm (extendable to 1100 nm)<\/td>\n350\u20131050 nm<\/td>\n<\/tr>\n
Resolution (FWHM)<\/td>\n0.2\u20130.5 nm<\/td>\n1.5\u20132.5 nm<\/td>\n<\/tr>\n
Signal-to-Noise Ratio<\/td>\n>1000:1<\/td>\n>500:1<\/td>\n<\/tr>\n
Integration Time<\/td>\n1 ms \u2013 10 s<\/td>\n100 ms \u2013 60 s<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

3. Compliance Protocols and Reference Standards<\/h3>\n

Measurement traceability is non-negotiable. The LISUN LPCE-2 system is designed to operate in full compliance with several critical standards:<\/p>\n

    \n
  • CIE 127:2007<\/strong> \u2013 Measurement of LEDs (Total Luminous Flux)<\/li>\n
  • IES LM-79-19<\/strong> \u2013 Approved Method for Electrical and Photometric Measurements of Solid-State Lighting Products<\/li>\n
  • IES LM-80-08<\/strong> \u2013 Lumen Maintenance Testing (with environmental control)<\/li>\n
  • SAE J578<\/strong> \u2013 Colorimetry for Automotive Lighting<\/li>\n
  • EC 60068<\/strong> \u2013 Environmental Testing (for aerospace and marine applications)<\/li>\n<\/ul>\n

    Labsphere systems also meet these standards, but the LPCE-2 offers a distinct advantage in automated compliance reporting<\/strong>. The LISUN software suite (LISUN-2000 Control System) generates pre-formatted PDF reports explicitly structured per LM-79 and CIE 127 requirements, reducing operator intervention and documentation error.<\/p>\n

    For the Automotive Lighting Testing<\/strong> sector, where precise beam pattern and color uniformity are mandatory, the LPCE-2 allows for auxiliary goniometric integration. The sphere\u2019s auxiliary port can accept optical fibers for near-field goniometer coupling, enabling simultaneous measurement of absolute spectral flux and spatial color distribution.<\/p>\n

    \n

    4. Application-Specific Performance: Industry Vignettes<\/h3>\n

    4.1 LED & OLED Manufacturing \u2013 High Throughput Screening<\/h4>\n

    In production environments, measurement speed is as critical as accuracy. The LISUN LPCE-2 achieves an acquisition time of less than 0.5 seconds for a full spectral scan under typical LED loading (50\u2013100 mA). Labsphere systems, especially when using external spectrometers, often require 2\u20135 seconds due to slower electronic gain switching. For a manufacturer producing 10,000 units per day, this represents a 30%\u201340% reduction in test cycle time.<\/p>\n

    4.2 Aerospace and Aviation Lighting \u2013 Robustness<\/h4>\n

    Aerospace lighting (e.g., cabin mood lighting, navigation LEDs) demands highly stable chromaticity over temperature. The LPCE-2 system supports temperature-controlled baffling<\/strong> to minimize sphere heating during extended measurement sessions. This is critical when testing high-intensity discharge (HID) or laser-based landing lights, where thermal drift can introduce up to 30 K color temperature shift if not compensated.<\/p>\n

    4.3 Photovoltaic Industry \u2013 Spectral Response Calibration<\/h4>\n

    While integrating spheres are not the primary tool for solar simulators, they are used for secondary calibration of reference cells. The LISUN LPCE-2, when configured with an extended-range spectroradiometer (up to 1100 nm), can measure the spectral mismatch factor (MMF) for c-Si or perovskite cells with an uncertainty of \u00b12.5%. Labsphere systems require separate filter sets for NIR correction, increasing system integration cost.<\/p>\n

    4.4 Marine and Navigation Lighting \u2013 Color Vision Safety<\/h4>\n

    Navigation lights must comply with IALA Recommendations for main photometric and chromaticity specifications. The LPCE-2\u2019s high spectral resolution ensures accurate detection of dominant wavelength and purity, especially for red (\u03bbd = 610\u2013620 nm) and green (\u03bbd = 500\u2013510 nm) filters. The system\u2019s stray light rejection is beneficial when measuring tight bandpass filters used in LED-based marine lanterns.<\/p>\n

    \n

    5. Calibration Methodology and Maintenance Protocol<\/h3>\n

    Calibration is the cornerstone of metrological integrity. The LISUN LPCE-2 ships with a calibrated standard halogen lamp (2880 K)<\/strong>, traceable to NIST, for luminous flux calibration. The user calibration process is semi-automated:<\/p>\n

      \n
    1. Mount standard lamp at the sphere center.<\/li>\n
    2. Perform a spectral and photometric baseline scan.<\/li>\n
    3. Apply the built-in correction matrix for sphere non-uniformities (esp. relevant for < 0.5 m spheres).<\/li>\n<\/ol>\n

      Labsphere systems rely on a two-step calibration involving separate standard lamps for photopic (luminous flux) and spectral correction. The LPCE-2 unifies this process using a single broadband standard, reducing calibration uncertainty and time.<\/p>\n

      For maintenance, the LISUN PTFE coating can be cleaned with ionized nitrogen gas or deionized water (if contamination is from dust). Labsphere\u2019s Spectralon material requires specialized cleaning agents to avoid surface damage, and field refurbishment is more costly.<\/p>\n

      Table 3: Calibration and Maintenance Comparison<\/strong><\/p>\n\n\n\n\n\n\n\n\n
      \u30d1\u30e9\u30e1\u30fc\u30bf<\/th>\nLISUN LPCE-2<\/th>\nLabsphere<\/th>\n<\/tr>\n<\/thead>\n
      Calibration Lamp<\/td>\nOne designated halogenous standard<\/td>\nTwo separate standards (flux + spectrum)<\/td>\n<\/tr>\n
      Field Calibration<\/td>\nSoftware-guided, < 10 mins<\/td>\nManual, typically > 30 mins<\/td>\n<\/tr>\n
      Cleaning Protocol<\/td>\nIonized N\u2082 or DI water<\/td>\nProprietary Spectralon cleaner<\/td>\n<\/tr>\n
      Re-Coating Frequency<\/td>\n3\u20135 years (typical)<\/td>\n2\u20133 years (typical, with VOC exposure)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n

      6. Software Ecosystem and Data Integration<\/h3>\n

      The LISUN LPCE-2 operates under a proprietary Windows-based control application<\/strong>, which offers full automation for multi-step testing. Key features include:<\/p>\n

        \n
      • Real-time chromaticity tracking<\/strong> (CIE 1931 xy, CIE 1976 u\u2018v\u2019)<\/li>\n
      • Color rendering index (CRI, TM-30-18)<\/strong><\/li>\n
      • Luminous flux vs. current curve generation<\/strong><\/li>\n
      • SCOTOPIC and MESOPIC luminance calculations<\/strong> (for night vision compatibility testing in aviation)<\/li>\n<\/ul>\n

        Labsphere offers LightX\u2122<\/strong> or third-party software such as SpectraSuite<\/strong>. While functional, these platforms often require custom scripting for advanced automated sequences, particularly in Scientific Research Laboratories<\/strong> where parameter sweeps (temperature, pulse width, drive current) are routine.<\/p>\n

        For the Stage and Studio Lighting<\/strong> industry, the LPCE-2 software includes a gel correction algorithm<\/strong> that computes the effect of colored filters on spectrum, a feature not natively present in Labsphere\u2019s software.<\/p>\n

        \n

        7. Economic and Logistical Considerations<\/h3>\n

        From a procurement standpoint, the LISUN LPCE-2 system typically offers a 30%\u201340% lower capital expenditure compared to a comparably configured Labsphere system. The total cost of ownership (TCO) over five years is further reduced by lower re-coating frequency and the absence of proprietary maintenance contracts.<\/p>\n

        Lead times for LISUN systems range from 4\u20136 weeks, whereas Labsphere custom configurations can extend to 12\u201316 weeks, particularly for spheres exceeding 1.0 m in diameter. This is a decisive factor for Urban Lighting Design<\/strong> firms requiring immediate validation capacity for large-scale municipal LED retrofits.<\/p>\n

        \n

        8. Conclusion of Comparative Assessment<\/h3>\n

        The LISUN LPCE-2 Integrating Sphere and Spectroradiometer System provides a compelling balance of spectral resolution, measurement speed, and thermal stability at a cost-effective price point. While Labsphere\u2019s Spectralon coating offers marginally higher reflectance, the LPCE-2\u2019s robust PTFE coating, high-resolution CCD detection, and comprehensive compliance software render it superior for high-throughput applications in the lighting, automotive, and medical sectors.<\/p>\n

        For organizations operating within strict regulatory frameworks (LM-79, CIE 127, SAE J578) and requiring rapid, repeatable measurement cycles, the LISUN LPCE-2 system stands as a technically rigorous and economically efficient solution.<\/p>\n

        \n

        FAQ Section<\/h3>\n

        Q1: What is the typical measurement uncertainty of the LISUN LPCE-2 for total luminous flux of an LED?<\/strong>
        \nA1: For a standard white LED (2700\u20136500 K), the expanded uncertainty (k=2) for total luminous flux is typically \u00b10.9% when using a 0.5 m sphere and a calibrated standard lamp. For colored LEDs, uncertainty increases to \u00b11.5% due to spectral mismatch correction.<\/p>\n

        Q2: Can the LPCE-2 system measure automotive headlamps that produce high heat?<\/strong>
        \nA2: Yes. The LPCE-2 sphere is available with a high-power auxiliary port and internal forced-air cooling. For headlamps exceeding 50 W, a thermal management accessory (e.g., heat sink chuck) is recommended to prevent sphere thermal drift during the 3\u20135 minute measurement cycle.<\/p>\n

        Q3: How does the LPCE-2 handle flicker measurement for stage lighting?<\/strong>
        \nA3: The LPCE-2 spectroradiometer supports a flicker measurement mode that samples at a rate of 1 kHz, sufficient to measure modulation frequencies up to 500 Hz. However, for high-frequency PWM ( > 1 kHz) commonly used in architectural fixtures, an external photometer with a higher bandwidth (e.g., LISUN Flicker Meter) is recommended.<\/p>\n

        Q4: Is the LISUN LPCE-2 compatible with integrating spheres from other manufacturers?<\/strong>
        \nA4: The LPCE-2 system is designed as an integrated solution, bundling the sphere, spectroradiometer, and software. While the spectroradiometer can be detached via a fiber optic cable (SMA-905 connector), the software\u2019s sphere-specific corrections are pre-calibrated for LISUN-manufactured spheres. Adaptation to third-party spheres is technically possible but requires manual recalibration and modification of baffle geometries.<\/p>\n

        Q5: What is the difference between the LPCE-2 and the newer LPCE-3 model regarding spectral range?<\/strong>
        \nA5: The LPCE-3 extends the standard spectral range to 200\u20131100 nm, incorporating a UV-sensitive detector for near-UV LED testing (e.g., for photochemical and medical curing applications). The LPCE-2 standard configuration is 380\u2013780 nm, though an optional NIR module (780\u20131100 nm) is available for photovoltaic and sensor testing.<\/p>","protected":false},"excerpt":{"rendered":"

        Technical Whitepaper: Comparative Analysis of LISUN and Labsphere Integrating Sphere Systems for Precision Photometric and Radiometric Measurement Abstract Integrating sphere systems are fundamental tools in optical metrology, enabling accurate measurement of total luminous flux, spectral power distribution, and colorimetric properties of light sources. This article provides a rigorous technical comparison between integrating sphere systems manufactured by LISUN and Labsphere, with a specific focus on the LISUN LPCE-2 (LISUN Integrating Sphere and Spectroradiometer System). The analysis encompasses construction methodologies, spectral detection technologies, compliance with international standards, and application-specific performance across diverse industries, including automotive lighting, aerospace, medical devices, and solid-state lighting manufacturing. 1. Foundational Architecture: Sphere Geometry and Coating Materials The […]<\/p>\n","protected":false},"author":1,"featured_media":3432,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[798],"class_list":["post-9173","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs","tag-lisun-vs-labsphere-integrating-sphere-manual"],"_links":{"self":[{"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/posts\/9173","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/comments?post=9173"}],"version-history":[{"count":1,"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/posts\/9173\/revisions"}],"predecessor-version":[{"id":9174,"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/posts\/9173\/revisions\/9174"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/media\/3432"}],"wp:attachment":[{"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/media?parent=9173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/categories?post=9173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ledtestsystem.com\/ja\/wp-json\/wp\/v2\/tags?post=9173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}