Microscope Head-Mounted Display With Direct Sight and Balanced Weight
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Solution Overview
Problem
Existing head-mountable display devices for microscopes obstruct the user's direct line of sight, limiting interaction with the environment and causing discomfort due to uneven weight distribution, particularly on the nose.
Innovation Solution
A head-mountable display device with a mounting structure that allows a direct line of sight to the object while being worn, using a first optical arrangement with at least one lens and distributing weight evenly across the head, and incorporating aspheric lenses for reduced size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a head-mountable display device is used to provide magnified stereoscopic view, then the viewing capability is improved, but the peripheral vision is blocked
Solution Approach 1:
The field of view is segmented into two parts: the central region displays the magnified microscopic image through the optical arrangement, while the peripheral regions remain transparent to allow direct vision. This segmentation enables simultaneous access to both magnified detail and surrounding environment without mutual interference.
Solution Approach 2:
Different regions of the display device have different optical properties: the central display area provides magnified stereoscopic imaging with high optical quality, while the peripheral areas maintain transparency with minimal optical interference to preserve direct vision and peripheral awareness.
2Stability of the object's composition
If the display device is mounted on the nose for alignment, then the alignment stability is improved, but the wearing comfort deteriorates due to nose pressure
Solution Approach 1:
The mounting structure is segmented into multiple support points: a nose piece for precise alignment and additional contact points on the cheeks or temples for weight distribution. This segmentation allows the alignment-critical nose piece to remain lightweight while the overall structure bears the weight through distributed contacts.
Solution Approach 2:
The mounting structure uses counterbalancing design where the weight of the display device is offset by distributing it to multiple support points on the head. The nose piece provides alignment reference while the broader mounting structure counteracts the gravitational force, preventing excessive pressure on any single point.
3Measurement precision
If multiple spherical lenses are used in the optical arrangement, then the optical performance is improved, but the size and weight increase
Solution Approach 1:
The lens geometry parameter is changed from spherical to aspheric profiles. This parameter change allows the lenses to achieve the same or better optical performance (magnification, aberration correction) with reduced curvature extremes, enabling thinner, lighter lens elements that maintain the required optical quality.
Solution Approach 2:
The optical arrangement uses composite lens designs combining different glass types or materials with different refractive indices and dispersion properties. This allows correction of optical aberrations through material composition rather than relying solely on complex multi-element spherical lens systems, reducing overall weight and size.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables unobstructed peripheral vision and improved wearing comfort by allowing direct interaction with the environment and reducing misalignment, while maintaining good optical performance and minimizing device size and weight.
Implementation Method 1
The first optical arrangement comprises at least one lens
Data Source
AI summary
A head-mountable display device for displaying an image received from a microscope comprises a first display configured to display a first image of a part of an object, the first image received from a microscope. Further, the head-mountable display device comprises a first optical arrangement located in front of the first display. The first optical arrangement comprises at least one lens. Additionally, the head-mountable display device comprises a mounting structure configured to fasten the first display to the head of a user. The head-mountable display device is configured to allow a direct line of sight from a first eye of the user to the object in a field of view of the user outside of the first display while the user is watching the first display through the first optical arrangement, if the mounting structure is fastened to the head of a user. An angle between a display direction and the direct line of sight is less than 50° and the display direction is orthogonal to the first display.