Ms. Xiaoli Hu Profile

Xiaoli Hu

at Wenzhou Medical 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 | 15 February 2022 Paper

Surface design for refractive multifocal optics

Siyu Liu, Ting Wan, Chaohui Zhou, Xiaoli Hu, Yiyu Li

Proceedings Volume 12166, 121660C (2022) https://doi.org/10.1117/12.2604999

KEYWORDS: Optical design, Refractive index, Optical spheres, Reverse engineering, Ophthalmology, Freeform optics, Eyeglasses

Read Abstract +

According to the principle of differential geometry, the surface power distribution of a continuous surface can be solved analytically. However, the reverse engineering from surface power distribution to surface geometry relies on numerical optimization methods. This paper proposes an efficient and high-precision surface construction method for rotationally symmetric multifocal optics design. Based on the requirements for the surface power distribution in the radial direction, this method calculates the relative offset of the curvature center coordinate along the x-axis direction for each point on the cross-section curve, then calculates the first-order derivative and the second-order derivative of the cross-section curve and the corresponding curvature radius and surface power. The deviation of the designed surface power from the target power is used as a measure of the accuracy of the multifocus optics design. This method is suitable for any rotationally symmetrical multifocal distribution pattern, including Gaussian multifocal distribution and step multifocal distribution, and has the potential to extend to the free-form multifocal surface design.

Proceedings Article | 5 November 2020 Paper

Diamond turning of gap-masked lens array on curved substrate

Yiyu Li, Tin Wang, Siyun Chen, Xiaoli Hu, Haihua Feng, Hao Chen

Proceedings Volume 11568, 115680L (2020) https://doi.org/10.1117/12.2576226

KEYWORDS: Surface finishing, Diamond turning, Coating, Spherical lenses, Lens design, Spindles

Read Abstract +

The unwanted light transmitting through the gap spaces of low fill factor lens array will deteriorate the signal contrast detected by the sensor. The high cost photolithographic techniques and optical coating technology have to be used to deposit a metallic film precisely filling these gap regions, which is only suitable for the lens array on flat substrate. In this paper, we will propose an efficient way for the fabrication of gap-masked lens array on a curved plastic substrate by using the direct diamond turning and spray coating process. The semi-finished lens array (SFLA) on a convex surface is first fabricated by rough cutting with fast tool servo. A paint film layer with mirror surface effect is then formed uniformly by spray coating on the SFLA which has a rotation speed controlled by the computer-numerically controlled (CNC) machine. At last, the lenslet surfaces are uncovered and regenerated by finishing cutting process. Without any reloading or re-position error, this cost-effective method can generate various gap-masked array optics on curved substrate with customized period and grid pattern.

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