Cloaking Device Tilt Correction Fresnel Prisms

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Solution Overview

Problem

Cloaking devices oriented at an acute or obtuse angle relative to objects outside a vehicle provide distorted images, necessitating a need for tilt correction to maintain image clarity.

Innovation Solution

A cloaking device with a zero-tilt axis and a tilt axis, featuring object-side and image-side optical components and tilt correction components, including Fresnel prisms, that redirect light to appear as if it passes through the cloaked region, correcting for the tilt and maintaining image clarity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the cloaking device is oriented at an acute or obtuse angle relative to objects outside the vehicle, then the cloaking device can be installed on vehicle pillars with various orientations, but the image of the objects becomes distorted

Engineering Contradiction:

Improveinstallation orientation flexibilityVSAvoidimage clarity

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The optical system is divided into multiple components: object-side optical component, image-side optical component, object-side tilt correction component, and image-side tilt correction component. Each segment performs a specific function in the light redirection path, allowing the system to handle tilted orientations while maintaining image quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Tilt correction components (Fresnel prisms) are introduced as intermediary elements between the object-side and image-side optical components. These intermediaries redirect light paths to compensate for the tilt angle, serving as mediators that correct the distortion caused by acute or obtuse orientation angles.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If tilt correction components are added to correct distorted images, then image clarity is maintained, but device complexity increases

Engineering Contradiction:

Improveimage clarityVSAvoidoptical component quantity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The tilt correction components serve multiple functions: they redirect light paths to correct tilt-induced distortion while maintaining compatibility with the existing optical components. The Fresnel prisms integrate into the optical system without requiring complete redesign of the entire device.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The tilt correction components are designed with specific geometric parameters (Fresnel prism angles and orientations) that are optimized for correcting acute and obtuse tilt angles. By adjusting these parameters, the system can adapt to different orientation requirements while maintaining image clarity.

Inventive Principle:

Principle #35Parameter changes

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

The solution ensures that light from objects appears to pass through the cloaked region without distortion, even when the cloaking device is tilted, thereby addressing the issue of distorted images caused by acute or obtuse angles.

Implementation Method 1

Light from an object on the object-side of the cloaking device propagating normal to the zero-tilt axis and incident on the object-side TC component is redirected generally normal to the tilt axis by the object-side TC component

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 2

Light propagating through the image-side optical component generally normal to the tilt axis is redirected generally normal to the zero-tilt axis by the image-side TC component to form an image of the object on the image-side of the cloaking device

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS11370358B2Cloaking devices with tilt correction and vehicles comprising the same

Publication Date: 2022.06.28 TOYOTA JIDOSHA KK

AI summary

A cloaking device comprises an object-side, an image-side, a cloaked region between the object-side and the image-side. An object-side optical component and an object-side tilt correction (TC) component are positioned on the object-side, and an image-side optical component and an image-side TC component are positioned on the image-side. The cloaking device is tilted relative to an object positioned on the object-side such that light from the object is incident on the cloaking device at an acute angle. The object-side TC component redirects light from the object incident on the cloaking device such that the light propagates through the cloaking device generally normal to the object-side and image-side optical components. The image-side TC component redirects light propagating through the cloaking device back to normal to the object to form an image of the object on the image-side of the cloaking device which, if not for the TC components, would be distorted.