Integrating Sphere | Goniophotometer | Surge Generator | ESD Simulator - LISUN

Abstract In the field of optical measurement, two key instruments—Shanghai LISUN’s vertical goniophotometer and the standard illuminance meter—play indispensable roles. Although their functions and applications differ significantly, they share a strong technical relationship that enables them to complement each other in various lighting engineering projects. This article presents an in-depth analysis of both devices, covering their working principles, technical features, usage scenarios, and mutual interconnection. It also discusses how these tools support lighting design, quality control, and performance evaluation, highlighting their combined value in modern lighting applications. With the rapid development of LED technology and growing emphasis on lighting efficiency and comfort, accurate optical measurements have become more crucial than ever. Whether for product certification, indoor lighting planning, or scientific research, selecting the right measurement tool is essential. The ...

Introduction In the realm of color measurement and material analysis, precision and accuracy are paramount. Among the various instruments designed for these purposes, sphere spectrophotometers stand out due to their unique ability to measure color in a way that closely mimics human vision. This article will delve into the functionalities, applications, and advantages of using sphere spectrophotometers, with special emphasis on the significant role played by Shanghai LISUN in the testing process. What is a Sphere Spectrophotometer? A sphere spectrophotometer is an advanced optical instrument used to measure the spectral reflectance or transmittance of materials. Its name comes from the integrating sphere—a spherical chamber with a highly reflective internal surface—that forms a key part of the device. The sphere’s design ensures that light is diffused evenly before reaching the detector, allowing for measurements that are not influenced by the texture or orientation of the sample being ...

Introduction In the realm of electronic testing and debugging, impulse generators serve as a critical tool widely used across signal generation, timing analysis, device testing, and research. Whether it’s developing new electronic devices or debugging existing systems, impulse generators provide precise pulse signals for testing and analysis. This article will delve into the fundamental concepts, operational principles, application scenarios of impulse generators, with special emphasis on the outstanding performance and unique features of Shanghai LISUN’s impulse generators. Surge Generator SG61000-5 Basic Concepts of Impulse Generators  • Definition of Impulse Generators: Shanghai LISUN impulse generators are advanced electronic instruments designed to generate pulse signals within specific time intervals, catering to a range from basic to complex applications. By generating pulses with fixed width, frequency, and amplitude, they offer robust support in electronic testing, communicati...

Introduction In modern indoor horticulture, the application of LED plant grow lights has become a trend. These fixtures significantly boost the efficiency and yield of indoor cultivation by providing suitable spectra for plant growth. However, when selecting appropriate LED grow lights, cultivators must understand two key parameters: Photosynthetic Photon Flux (PPF) and Photosynthetic Photon Flux Density (PPFD). This article delves into the definition, measurement methods, and importance of PPFD in plant growth, with a focus on Shanghai LiShan’s technical applications in PPFD measurement processes. What is PPFD? Photosynthetic Photon Flux Density (PPFD) refers to the number of photons received per unit area, typically measured in micromoles per square meter per second (μmol/m²/s). Unlike PPF, which measures the total photon output from a light source, PPFD takes into account the distribution of light across the plant canopy. Understanding “what is PPFD” is crucial because it directly i...

Introduction In modern technology and industry, the precise measurement of light intensity plays a pivotal role. Whether in lighting engineering, optical equipment manufacturing, or scientific research, the phrase “intensity of light is measured in” serves as a fundamental yet crucial concept. Understanding the units used to measure light intensity and their applications not only enhances product quality but also drives technological innovation. This article delves into the primary units of light intensity measurement and highlights how the Lisun Goniophotometer excels in testing light intensity with precision. LM-79 Moving Detector Goniophotometer (Mirror Type C) Basic Units for Measuring Light Intensity • Candela (cd) The candela is one of the seven base units in the International System of Units (SI) and is used to describe the luminous intensity of a light source in a specific direction. It is defined as the luminous intensity, in a given direction, of a source that emits monochrom...

Introduction In the design of modern electronic products, Ingress Protection (IP) ratings are crucial standards for assessing a device’s ability to withstand environmental factors such as dust and water ingress. Among these, IPX7 waterproofing has garnered significant attention because it signifies that devices can endure immersion in 1 meter of water for up to 30 minutes without sustaining damage. This article will delve into the concept of IPX7 waterproofing, testing methodologies, their limitations, and introduce how Shanghai LISUN’s JL-X waterproof testing system effectively conducts waterproof rating tests. Understanding IPX7 Waterproof Rating The IP (Ingress Protection) code consists of two digits, representing protection against solid objects including dust and liquids. When an “X” appears, it indicates no information is available regarding that specific type of protection. Therefore, in IPX7, the “X” means there is no specified dust protection, while the “7” confirms compliance...

Abstract In modern electronic design and compliance testing, immunity to electrical fast transients (EFT) is a critical performance indicator. The eft test generator serves as a standard tool to simulate such disturbances, ensuring electronic equipment can withstand operational disruptions. This paper discusses the technical principles, structural design, and test methods of the eft test generator, with a focus on the LISUN EFT61000-4 EFT Immunity Measurement product. The study elaborates on how the generator fulfills IEC61000-4-4 standard requirements, providing stable and repeatable test environments. Experimental configurations, waveform specifications, and output characteristics are presented alongside practical application scenarios in electronic testing environments. Introduction The rise of digital control systems and power electronics in today’s industry has made electromagnetic compatibility (EMC) compliance more essential than ever. Among various EMC tests, immunity to electr...