AR, VR, and MR glasses are all head worn devices with an ambition of integrating sensors and cameras as well as highly functional displays. Size, weight and power are crucial parameters to consider for all features. In this paper we present an update on latest results and trends in refractive waveguides seen from a mastering perspective. In addition, several use cases of how metalenses are crucial to build efficient and ultra compact sensors and cameras.
We present our latest developments and results in making masters for replication of surface relief waveguides. Accurate control of the diffractive gratings in the input, expander and outcoupling (eyebox) areas are essential for good performing AR glasses. Advanced shapes of the gratings are used in many designs, and we here present results from masters and sub-masters having large areas with high precision, binary structures as well as both blazed and slanted gratings. Besides the waveguides used in in the displays, registration of the actual surroundings using 3D sensing is a very important feature to get the fullest out of the AR experience. We present latest developments of our compact optical solutions for 3D sensing
Maksim Zalkovskij, Lasse Thamdrup, Kristian Smistrup, Thomas Andén, Alicia Johansson, Niels Jørgen Mikkelsen, Morten Hannibal Madsen, Jørgen Garnæs, Tommy Tungelund Kristiansen, Mads Diemer, Michael Døssing, Daniel Minzari, Peter Torben Tang, Anders Kristensen, Rafael Taboryski, Søren Essendrop, Theodor Nielsen, Brian Bilenberg
In this paper, we present a route for making smart functionalized plastic parts by injection molding with sub-micrometer
surface structures. The method is based on combining planar processes well known and established within silicon micro
and sub-micro fabrication with proven high resolution and high fidelity with truly freeform injection molding inserts.
The link between the planar processes and the freeform shaped injection molding inserts is enabled by the use of
nanoimprint with flexible molds for the pattern definition combined with unidirectional sputter etching for transferring
the pattern. With this approach, we demonstrate the transfer of down to 140 nm wide holes on large areas with good
structure fidelity on an injection molding steel insert. The durability of the sub-micrometer structures on the inserts have
been investigated by running two production series of 102,000 and 73,000 injection molded parts, respectively, on two
different inserts and inspecting the inserts before and after the production series and the molded parts during the
production series.
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.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
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.