| 查看: 1801 | 回复: 4 | ||||
[求助]
请问红外reflectance和absorbance的区别，以及如何转化，十分感谢！
|
| 侧红外时纵坐标意义不太理解，求教！谢谢！ |
回复此楼» 猜你喜欢
Crystals（IF=2.9）- Special Issue invatation- Functional Materials
已经有0人回复
-
分子筛催化方向 一篇cej共一第一 可以申请上海什么学校呢
已经有4人回复
-
专业论文润色/翻译怎么收费?
已经有128人回复
-
求助共晶分子筛的电镜图分析，有偿
已经有1人回复
-
中南大学化学化工学院招收电池储能、理论计算方向博士生
已经有16人回复
-
风电环氧领域
已经有3人回复
-
请问哪里可以代烧带压力的炉子？
已经有6人回复
-
关于合成MIL-125的求助
已经有0人回复
-
双非本硕光催化方向想读博，请各位老师看看我！
已经有2人回复
-
瑞典林雪平大学范立洲课题组现招聘博士后、岗位制博士生
已经有0人回复
» 本主题相关价值贴推荐，对您同样有帮助:
- 如何将漫反射光谱转化为吸收光谱
已经有9人回复
2楼2013-04-27 10:40:31
3楼2013-04-27 11:22:36
readytogo
荣誉版主 (文学泰斗)
瓜帅-催化剂
-
专家经验: +150 - C-EPI: 1
- 应助: 735 (博后)
- 贵宾: 46.834
- 金币: 140720
- 散金: 30720
- 红花: 401
- 沙发: 997
- 帖子: 85926
- 在线: 5149.2小时
- 虫号: 481323
- 注册: 2007-12-17
- 专业: 催化化学
- 管辖: 科研生活区编辑部
【答案】应助回帖
★ ★ ★ ★ ★
感谢参与，应助指数 +1
王晓萌: 金币+2, 谢谢分享！ 2013-04-27 22:40:20
SPRINTL: 金币+3, ★★★很有帮助 2013-04-28 15:44:47
感谢参与，应助指数 +1
王晓萌: 金币+2, 谢谢分享！ 2013-04-27 22:40:20
SPRINTL: 金币+3, ★★★很有帮助 2013-04-28 15:44:47
|
Reflectance与Reflectance factor： Reflectance/transmittance is the ratio of the reflected/transmitted radiant flux to the incident flux (measured in watts). Similarly to the phenomena one distinguishes between regular and diffuse reflectance/transmittance. The usual symbol is the Greek letter ρ for reflectance and τ for transmittance. Reflectance factor is a quantity that has to be distinguished from reflectance. It is defined as the ratio of the radiant flux reflected in the direction delimited by a given cone (see Figure3 - 9), to the reflected radiant flux reflected in the same directions by a perfect reflecting diffuser identically irradiated. Its usual symbol is R. The angular distribution of the irradiation and the cone of observation have to be defined to be able to compare results taken with different instruments. The reflectance factor will approximate the reflectance as the observation cone approaches 2π sr (steradian). On the other hand for regularly reflecting surfaces that are irradiated by a beam of small solid angle,the reflectance factor may be much larger than 1 if the cone includes the mirror image of the source. If the cone delimiting the reflected radiant flux in the definition of the reflectance factor is negligibly small we get the radiance factor, where the reflected radiance of the surface is compared to the radiance of the equally irradiated perfect reflecting diffuser. It is usual to use the symbol β to describe the radiance factor. Above are the most important quantities used in describing the colorimetric characteristics of materials, for further details please consult the Glossary or the relevant CIE publications |
4楼2013-04-27 22:16:15
5楼2013-04-28 15:46:14