英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:



安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Photometry (optics) - Wikipedia
    Photometry is a branch of optics that deals with measuring light in terms of its perceived brightness to the human eye [1] It is concerned with quantifying the amount of light that is emitted, reflected, transmitted, or received by an object or a system
  • Photometry: Definition, Photometric Quantities, and Applications
    Photometry is the precise measurement and study of visible light, which is perceived as brightness by the human eye It quantifies light and contextualizes it within the limits of human vision, considering factors like brightness, color, and perceived intensity
  • What Is Photometry? The Science of Light Measurement
    Everyday Uses of Photometric Data Photometric units show up in more places than most people realize When you compare lightbulbs, the lumen rating tells you how much visible light the bulb produces, which is far more useful than wattage for judging brightness across LED, fluorescent, and incandescent options
  • Principles of Photometry: Measuring Light as Perceived by the Human Eye
    Photometry measures visible light as humans perceive it It deals with brightness, color, and sensitivity across specific wavelengths, which sets it apart from other optical sciences that don’t account for human vision Photometry quantifies visible light, usually in the 360 to 830 nanometer range
  • The Basics of Photometric Measurement - Xylem Analytics
    Photometry is a process in which a solution or dissolved sample is analyzed with the help of a light source By measuring the light absorption of the sample, the concentration of the substances contained in it is determined
  • Photometry: The Answer to How Light Is Perceived - Photonics
    Simply put, photometry is the measurement of visible light based on the response of the average human observer How that definition translates into technically correct quantification methods is the focus of this article
  • Photometry - RP Photonics
    Photometry is the science and technology of quantifying and measuring properties of light related to its perceived brightness for human eyes It thus deals with visible light only, not with infrared and ultraviolet light, and takes into account the spectral sensitivity of the human eye
  • Photometry - an overview | ScienceDirect Topics
    The photometric system is based on the standard observer, an imaginary individual whose visual system has an agreed upon and precisely defined spectral sensitivity, chosen to mimic the spectral sensitivity of the average human visual system
  • Introduction to Radiometry and Photometry - Oxford Instruments
    Photometry is the science of measuring visible light in units that are weighted according to the sensitivity of the human eye It is a quantitative science based on a statistical model of the human visual response to light - that is, our perception of light - under carefully controlled conditions
  • Photometric definitions - Stanford Computer Optics
    It is a quantitative science based on a statistical model of the human visual response to light under carefully controlled conditions The subjective impression of seeing can be quantified for “normal” viewing conditions





中文字典-英文字典  2005-2009