国产一级a毛一级a看免费视频,久久久久久国产一级AV片,免费一级做a爰片久久毛片潮,国产精品女人精品久久久天天,99久久久无码国产精品免费了

您好, 歡迎來到化工儀器網(wǎng)

| 注冊(cè)| 產(chǎn)品展廳| 收藏該商鋪

18861759551

technology

首頁   >>   技術(shù)文章   >>   Understanding Spatial Filters

江陰韻翔光電技術(shù)有限公司

立即詢價(jià)

您提交后,專屬客服將第一時(shí)間為您服務(wù)

Understanding Spatial Filters

閱讀:2343      發(fā)布時(shí)間:2017-7-24
分享:

Understanding Spatial Filters

Spatial Filters are designed to be used with lasers to "clean up" the beam. Often times a laser system does not produce a beam with a smooth intensity profile. In order to produce a clean Gaussian beam, a spatial filter is used to remove the unwanted multiple-order energy peaks and pass only the central maximum of the diffraction pattern (see illustration). Also, when a laser beam passes through a system, dust in the air or on optical components can disrupt the beam and create scattered light. This scattered light can leave unwanted ring patterns in the beam profile. The spatial filter removes this additional spatial noise from the system. The spatial filter assembly consists of a microscope objective, a pinhole aperture, and a positioning mechanism. The positioning mechanism has precision X-Y movements that center the pinhole at the focal point of the objective lens. Our TECHSPEC® Laser Objectives are designed for HeNe lasers (632.8nm) and provide the smallest spot sizes possible. Choosing the correct pinhole and objective combination will yield optimal results. The following equations were used to determine the values for the Aperture Selection Chart.

Equation 1.0 Beam Spot Diameter (microns) = (1.27 * λ * f) / D

Where:

λ = wavelength of laser (microns)

f = focal length of objective lens (mm)

D = input beam diameter (mm)

 

Equation 2.0 Pinhole size is then determined for the table (see note):

Pinhole Diameter (microns) = 1.5 * Beam Spot Size Diameter (microns)

 

Note: The factor of 1.5 in Equation 2.0 is determined as the optimal factor in order to pass the maximum amount of energy, while eliminating as much spatial noise as possible.

 

Aperture Selection Chart

EFL of Microscope Objective Lens (mm)

5.5mm

8.0mm

8.5mm

9.0mm

0.96mm Input Beam Dia.

8μm

10μm

12.5μm

12.5μm

0.81mm Input Beam Dia.

8μm

12.5μm

12.5μm

15μm

0.75mm Input Beam Dia.

8μm

12.5μm

15μm

15μm

0.70mm Input Beam Dia.

10μm

15μm

15μm

15μm

0.68mm Input Beam Dia.

10μm

15μm

15μm

15μm

0.63mm Input Beam Dia.

10μm

15μm

15μm

15μm

0.48mm Input Beam Dia.

12.5μm

20μm

20μm

25μm

會(huì)員登錄

請(qǐng)輸入賬號(hào)

請(qǐng)輸入密碼

=

請(qǐng)輸驗(yàn)證碼

收藏該商鋪

標(biāo)簽:
保存成功

(空格分隔,最多3個(gè),單個(gè)標(biāo)簽最多10個(gè)字符)

常用:

提示

您的留言已提交成功!我們將在第一時(shí)間回復(fù)您~
在線留言
主站蜘蛛池模板: 渝北区| 冀州市| 临夏县| 白沙| 会理县| 凤阳县| 射阳县| 稷山县| 丹东市| 仙游县| 论坛| 临夏市| 拜城县| 巴楚县| 苏尼特左旗| 日土县| 冷水江市| 土默特左旗| 宝丰县| 焦作市| 长葛市| 甘谷县| 蒙阴县| 博兴县| 乌兰浩特市| 塔城市| 阳曲县| 台东市| 屏边| 临沭县| 安图县| 昌黎县| 商洛市| 尉犁县| 庐江县| 西乡县| 郧西县| 泗阳县| 大余县| 南召县| 营口市|