Cone mirror 20 degrees.

[ogog]

If I feed a 20 degrees cone mirror tip with a laser, would I get a conical beam of 20 degrees ? I do not want to use rotational scanning to get a conical beam shape.

Bosch uses 45 degree ones for leveling applications.

Thanks.

 

[Encap]

If I feed a 20 degrees cone mirror tip with a laser, would I get a conical beam of 20 degrees ? I do not want to use rotational scanning to get a conical beam shape.

Bosch uses 45 degree ones for leveling applications.

Thanks.

Ask the people that sell them see: https://www.edmundoptics.com/optics/optical-mirrors/specialty-mirrors/cone-mirrors/"
From the web sitr:
"Ideal for 360° Applications---Multiple Diameters Available --Protected Aluminum Coating

TECHSPEC® Cone Mirrors are ideal for laser and imaging systems, and for applications requiring 360° illumination. The cone mirrors have a polished cone top and base, and a fine ground circumference."

 

[ogog]

Thanks I did now. They suggested Axicon conical prisms.

I am trying to generate a continous conical beam of 20 degrees without rotational optics.

I thought I could do it with a cone mirror that has an angle of 20 degrees.

 

[diachi]

An Axicon would be a good choice of lens if you are aiming to produce a circle/conical beam.

https://www.edmundoptics.com/resources/application-notes/optics/an-in-depth-look-at-axicons/

Edit: Looks like someone already suggested those to you.

 

[ogog]

Thanks. I still wonder why a cone mirror can not be used for that. I have searched the internet, could not find an implementation for that.

 

[Gadget]

Thanks. I still wonder why a cone mirror can not be used for that. I have searched the internet, could not find an implementation for that.

Think about it.
If you direct a single, stationary laser beam at a mirror, no matter what shape the mirror is, all you're going to get is a single beam reflecting off of that mirror at some angle. Shape of the mirror is not a factor in this scenario.
Making sense?
-G

 

[diachi]

Think about it.
If you direct a single, stationary laser beam at a mirror, no matter what shape the mirror is, all you're going to get is a single beam reflecting off of that mirror at some angle. Shape of the mirror is not a factor in this scenario.
Making sense?
-G

It is a factor with a non-flat mirror.

If the middle of your beam is aligned with the point of the reflective cone and is parallel you will get a cone reflected from the mirror, the angle of which depends on the angle of the mirrored cone.

Curved mirrors also have an effect, a "concave" mirror for example will focus the beam to a point, while a "convex" mirror will make the beam wider.

So yes, the shape of the mirror's surface is very important, anything but a flat mirror will result in changes to the shape of a beam.

 

[ogog]

I actually found one implementation with a cone mirror

http://opticalengineering.spiedigitallibrary.org/data/journals/optice/22102/084002_1_1.png


This is a larger than 45 degrees mirror. If the mirror angle were less than 45 degrees, would the conical shape form on the opposite i.e away from the laser ?

 

[ogog]

This is the article:

Generation of hollow conic beams using a metal axicon mirror | Optical Engineering | SPIE

 

[paul1598419]

The article actually answered your question. But, to get a circular beam projected from a conical mirror you need a good Gaussian beam and have it parallel to the axis of the mirror, which would be done with a small flat mirror at 45 degrees with the beam coming in at 90 degrees.

 

[ogog]

Yes, partially. This is what I wonder if works or not:

 

[ogog]

https://drive.google.com/file/d/0BxgYUQicEpVQN2FBVWxwTUxTZGM/view?usp=sharing