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TECHSPEC® 组件由爱特蒙特光学设计、规定或生产。 了解更多

远心照明光源 242mm

118mm Telecentric Backlight Illuminator, #35-428

118mm Telecentric Backlight Illuminator, #35-428

产品编码 #35-428
RMB 14,831.25 RMB 11,865.00
数量 1
RMB 14,831.25 RMB 11,865.00
含税批量价格
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注意: 此项目需要附件以供使用 | 了解更多信息
直径 (mm):
150.00
长度 (mm):
267.40
Type of Illumination:
Specialty
注意 :
Aperture is not adjustable
Beam Diameter (mm):
118
生产商:
EO
几何:
Backlight
Mounting Flange Diameter (mm):
200
Light Mount Inner Diameter (mm):
8

合规性

品名

TECHSPEC® Telecentric Backlight Illuminators use the optical design principal of telecentricity to illuminate objects with truly collimated light and produce high contrast, silhouetted images. Standard backlights are diffuse to avoid hot spots, but these diffuse reflections can also reduce edge contrast. TECHSPEC® Telecentric Backlight Illuminators have collimated light rays (not diffuse) to increase edge contrast, thereby increasing measurement accuracy. Used in combination with a telecentric imaging lens, these illuminators are ideal for machine vision applications that require accurate measurements and are compatible with 8mm coaxial LEDS or ¼" (0.312") fiber optic light guides.

Note: Additional light source and light source power supply required for operation.

技术信息

 

为什么使用远心照明?

  • 可提供比传统背光照明更高的边缘对比度
  • 非常适用于精密测量应用
  • 优异的微小缺陷检测能力、测量准确度和重复性
  • 可增加物体和照明源之间的距离
Clear Edge Silhouette from Telecentric Illuminator System
Blurry Edges from Standard Backlight System
Collimated Light Rays from a Telecentric Illuminator
Diffuse Reflections from a Standard Backlight
                           
图 1: 比较使用远心照明(左)与使用传统背光照明(右)所达到的边缘对比度。远心照明的平行光可提供高对比度轮廓,而标准背光照明的漫反射产生的边缘则模糊不清.

 

数值孔径 (NA) 匹配的重要性

  • 照明源与成像镜头实现 NA 匹配将最大限度提高系统的效率
  • 如照明源的 NA 小于成像镜头的 NA,会导致人为边角失光
  • 如光线对成像镜头填充不足,会降低对比度,并导致物体信息损失
  • 如光线对成像镜头过度填充会舍弃部分光线,但相对于填充不足的情况则较为理想
Underfilling occurs if the NA of the illumination source is smaller than the NA of the imaging lens, reducing contrast and resulting in loss of object information. Green lines represent the NA of the illumination source and blue lines represent the NA of the imaging lens.
图 2a: 如照明源的 NA 小于成像镜头的 NA,会出现填充不足,导致对比度降低和物体信息损失。绿线表示照明源的 NA,蓝线表示成像镜头的 NA.
Overfilling occurs if the NA of the illumination source is larger than the NA of the imaging lens, causing some light to be wasted. Overfilling is preferable than underfilling, but the NA’s should be as close as possible to reduce the amount of light loss.
图 2b: 若照明源的 NA 大于成像镜头的 NA,会出现过度填充,导致某些光线浪费。过度填充的情况好于填充不足,但是 NA 应该尽可能靠近以减少光线的损失.

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