Realization of augmented reality (AR) solutions is key towards the much-needed integration of digital content into the real world. This seamless integration of digital content with the real world in AR devices is achieved by displaying the information using a suitable projector in the field-of-view (FOV) of the user. One of the most practical solutions to realize this is a laser beam scanner (LBS) projector combined with a diffractive optical waveguide. Features such as a small form factor, high brightness, large color gamut, and low power-consumption make LBS a popular choice as the light engine for the emerging consumer market for AR displays where the primary focus is on obtaining a stylish wearable rather than an unwieldly head mounted device. As should be the case for any AR/VR/MR display, LBS plus waveguide solution must be evaluated against the IEC 60825- 1:2014 standard for a typical use case. In this manuscript, we will first describe a typical AR solution, a TriLite Trixel® 3 LBS plus a waveguide combiner. We will discuss the operating principle of such a device. Based on that we shall highlight stepwise the key considerations in such a system for ensuring a Class 1 operation in a typical AR use case as per the IEC 60825-1:2014 requirements.
Augmented reality (AR) displays have been a hot topic for many years as they offer potential for a high return on investment. With this high potential come many technical challenges to be addressed before AR displays and smart glasses become more accepted in the marketplace. One of the technical challenges is the optical design of compact and lightweight optics capable of projecting an augmented image onto the user line of sight with comfort. Major advances are being made in waveguide technology to produce large FOV and eye-box. Equally, light engines are also being developed to be less bulky and more efficient. In this paper we present an insight on how a next generation laser beam scanner (LBS) developed by TriLite Technologies can be integrated with different combiners and implemented for different AR displays and smart glasses architectures. The unique design of the LBS lends itself to fit in different configurations as dictated by the different designs and layouts of waveguide and combiners. In addition, the extremely low profile of the next generation LBS make the glasses look smart literally.
As of today, display performance is a major development criteria in the quest to deliver consumer-ready, high-quality XR glasses. Laser beam scanners in comparison with other display technologies are among the most promising high-dynamic range RGB display engine architectures, e.g., because the size of these devices remains unchanged when increasing the display resolution and field of view. This is in sharp contrast to competing display engines where each pixel constitutes an individual component and these technologies at some point seem to reach their physical limits. On the other hand, manufacturing state-of-the-art laser beam scanners including optics seems especially labor intensive, exhibiting a low yield, therefore driving up the price of XR glasses. This paper addresses the potential benefits and pitfalls of using laser beam scanners in XR and gives an insight into new solutions in next-gen laser beam scanning devices like, e.g., replacing cumbersome hardware beam combination by mere software solutions.
The design challenge of an optical system is not limited to the optical design itself and its performance in nominal conditions; it extends to the realisation of a system which includes tolerancing and manufacturability as well as meeting system requirements such power consumption, heat dissipation, mass, cost constraints and timescales. In this presentation, optical designs for different applications ranging from satellite optical imager to Augmented Reality Displays are presented to illustrate the different challenges that an optical design needs to address. Augmented Reality will prove to be a very useful tool in our everyday lives; it brings elements of the virtual world into the real world, enhancing what we see, hear, and feel. With this comes a high demand for compact, light, affordable and high-quality displays.
A description of an optical relay subsystem used in a high resolution earth observation satellite imager is presented. Tolerance and thermal analysis showed that very tight tolerances are required to achieve diffraction limited performance. The alignment technique and verification of the build of different components are presented. Typical results of the alignment process together with predicted performance are reported. Optical characterisation of the relay subsystem in terms of wavefront analysis is described. To achieve diffraction limited performance an optical correction method was developed and implemented. The successful practical implementation of wavefront correction to achieve diffraction limited relay lens system is demonstrated.
This paper reviews the design process underlying development of a second generation multi-photon laser scanning microscope (MPLSM) system and the methods used to characterize its performance. The purpose is to show how each of several elements of the design present complex design choices which must be resolved in the overall interests of instrument performance combined with ease of use in difficult experiments involving live samples. The paper is intended to stimulate discussion of how close we are to making MPLSM accessible as a routine microscopy method, as opposed to a specialized, user engineered technique. The issue of detector design in MPLSM poses the well known problem of how to collect as much as possible of the emitted fluorescence as its escapes from the sample. The challenge in design of a commercial system is to combine the highest possible detection sensitivity with the requirements of laser safety, ease of use and adaptability to different microscope platforms. This paper will present a 'hybrid' approach to MPLSM detection where the user can select one of several detection strategies according to the nature of the particular sample. Proposals will be presented how detector performance can be compared between systems of different design.
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.