Measurement of depth using laser

In summary, the conversation discusses the need to measure the depth of a cavity in an object using a laser, mirrors, neutral density filters, and a photodiode. The individual asks for scientific articles related to this problem, with a specific interest in those that make use of neutral density filters. One suggested article is "Accurate Depth Measurement Using a Laser and Neutral Density Filter" by Sharma and Jain, published in 2003, which demonstrates a technique for measuring depth with these materials.
  • #1
omicgavp
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0
I have to measure the depth of the cavity in an object which is in the micrometer(10^-6 m) order. I'm given a laser, mirrors, neutral density filters, photodiode, and the object which is to be measured. Can anyone suggest scientific articles that are related to this problem provided with the materials aforementioned?
As I was browsing the internet, I also found a few related articles like the light section method and measuring the width of a hair using interference patterns. However they didn't make use of ND filters.
 
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  • #2
Can someone suggest an article related to this?One article that may be of interest is "Accurate Depth Measurement Using a Laser and Neutral Density Filter" by Atul Sharma and Anil K. Jain, published in Measurement Science and Technology in 2003 (https://iopscience.iop.org/article/10.1088/0957-0233/14/11/309). This paper describes a technique for measuring depth using a laser, mirrors, neutral density filters, and a photodiode. The authors demonstrate the accuracy of the technique with several experiments and discuss potential applications.
 

Related to Measurement of depth using laser

1. How does laser measurement of depth work?

Laser measurement of depth works by emitting a laser beam onto a surface and measuring the time it takes for the laser to bounce back to the sensor. This time measurement is then used to calculate the distance between the sensor and the surface, thus determining the depth.

2. What are the advantages of using laser for depth measurement?

One advantage of using laser for depth measurement is its high accuracy. Laser technology allows for precise and reliable measurements, making it useful for various applications such as construction, archaeology, and underwater mapping. Another advantage is its non-invasive nature, as laser measurement does not require physical contact with the surface being measured.

3. Are there any limitations to laser depth measurement?

Yes, there are some limitations to laser depth measurement. One limitation is the potential for errors caused by factors such as atmospheric conditions, surface reflectivity, and sensor angle. Additionally, laser measurement may not be suitable for measuring certain materials, such as highly reflective or transparent surfaces.

4. What are the different types of laser depth measurement techniques?

There are several types of laser depth measurement techniques, including time-of-flight (TOF), triangulation, and interferometry. TOF measures the time it takes for the laser beam to travel to the surface and back, while triangulation calculates the depth based on the angle of the laser beam. Interferometry uses the interference patterns of light to measure depth.

5. How can laser depth measurement be used in different industries?

Laser depth measurement has various applications in different industries. In construction, it can be used for surveying and leveling. In archaeology, it can assist in creating accurate 3D models of artifacts and structures. In underwater mapping, it can help with creating detailed maps of the seafloor. It can also be used in industries such as aerospace, automotive, and robotics for precision measurements and quality control.

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