Mr. Qimeng Sha Profile

Qimeng Sha

at Space Engineering Univ

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 12 March 2021 Paper

Measurement of rotational speed and eccentric distance of non-cooperative object using vortex beam

Qimeng Sha, Song Qiu, Weijie Wang, Tong Liu, Yuan Ren

Proceedings Volume 11763, 117635T (2021) https://doi.org/10.1117/12.2587279

Read Abstract +

The vortex beam with helical phase has great potential in detecting rotating targets. Offset, inclination and even the optical axis not in the same plane with the rotational axis often exist between the beam and the rotational axis when the non-cooperative rotating target is measured by vortex beam. To effectively measure rotational speed and eccentric distance (the distance of facula center and the center of rotation on the object being detected) of non-cooperative object, according to the scattering point model and rotational Doppler effect principle, this paper proposes a geometric projection method to study the detection problem about the incidence of the beam at arbitrary position relative to the object’s rotational axis, and analyzes the change of rotational Doppler frequency shift in the state of existing both offset and inclination, and obtains the rule of the extremum of the rotational Doppler frequency shift changing with the relative space position parameters. On this basis, the rotational speed and the eccentric distance are obtained when both eccentricity and inclination exist and the optical axis of vortex has no deflection. And a method for detecting the rotational speed and the eccentric distance of non-cooperative target is proposed. The conclusions obtained in this paper have some guiding significance for further application of rotational speed detection technology based on vortex beam.

Proceedings Article | 2 December 2020 Paper

Theoretical research on rotating doppler effect based on fringe model

Zhimeng Li, Hua Wang, Yuan Ren, Tong Liu, Song Qiu, Chen Wang, You Ding, Qimeng Sha, Yaxiong Zhu

Proceedings Volume 11717, 117173U (2020) https://doi.org/10.1117/12.2588288

Read Abstract +

The fringe model can directly explain the principle of dual beam differential Doppler effect. Superimposed state vortex light is a petal-like interference fringe superposed by positive and negative topological charge vortex beams. Based on this, the idea of fringe model is applied to the principle of rotational speed measurement based on the rotation Doppler. The rotation Doppler frequency shift based on the model was derived by means of spatial geometric transformation. According to the relative location between the optical axis of vortex and the object rotation axis, three typical incident conditions which are coincident, offset and tilt are considered. The results show that the frequency shift based on the fringe model is consistent with that of the traditional rotation Doppler model, which proves that the model is suitable for the interpretation of the principle of rotation Doppler velocity measurement. This study provides a more intuitive and concise theoretical explanation for the rotational Doppler effect, which has certain guiding significance.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years