Anti-vibration Telescope Erecting Prism Gimbal Control

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Solution Overview

Problem

Existing anti-vibration optical devices struggle to accurately correct image blur when the erecting prism is arranged other than at the middle position between the objective lens group and the eyepiece group.

Innovation Solution

The anti-vibration telescope incorporates a flexible arrangement of the erecting prism, supported by a gimbal mechanism and controlled by an actuator, which adjusts the prism's orientation based on detected angular velocities to correct image blur effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the erecting prism is arranged at the middle position between the objective lens group and the eyepiece group, then the image blur correction is accurate, but the flexibility in arranging the erecting prism is limited

Engineering Contradiction:

Improveflexibility in arranging the erecting prismVSAvoidimage blur correction accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent applies the dynamics principle by making the erecting prism rotatable via a gimbal mechanism and actuator system. This allows the prism to dynamically adjust its orientation and position, enabling it to be arranged at various locations between the objective lens group and eyepiece group while maintaining accurate image blur correction capability. The rotational freedom transforms a static, position-fixed system into a dynamic, position-adaptable system.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the orientation parameter of the erecting prism by introducing rotational degrees of freedom through the gimbal mechanism. By controlling the rotation angles (e.g., θ1, θ2) of the prism, the system can adapt to different arrangement positions while maintaining the optical path and image blur correction functionality. This parameter adjustment allows the same prism to function effectively at multiple positions.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the erecting prism is arranged other than at the middle position, then the flexibility in arrangement is improved, but the image blur correction accuracy deteriorates

Engineering Contradiction:

Improvearrangement flexibilityVSAvoidimage blur correction accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent incorporates feedback through angular velocity detection sensors that detect the rotation state of the erecting prism. The controller uses this feedback information to adjust the actuator control signals, ensuring that the prism maintains the correct orientation for accurate image blur correction regardless of its arrangement position. This closed-loop feedback system guarantees reliable correction performance across different configurations.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces traditional mechanical coupling methods with an actuator-based rotational support system. Instead of fixing the prism mechanically at a specific position, the system uses controlled actuators to maintain the appropriate optical orientation, enabling flexible arrangement while preserving correction accuracy through active control rather than passive mechanical constraint.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This configuration enhances the flexibility in arranging the erecting prism and enables precise image blur correction, even when the prism is not at the traditional middle position, thereby improving optical performance and reducing weight and size.

Implementation Method 1

an angular velocity detection sensor for detecting an angular velocity of the erecting prism

Methodology Applied

Scientific EffectAngular velocity detection: Accelerometer

Implementation Method 2

a gimbal mechanism for rotatably supporting the erecting prism and including a first pivot and a second pivot

Methodology Applied

Scientific EffectGimbal mechanism: Gimbal

Data Source

PatentEP3869260B1Anti-vibration telescope

Publication Date: 2025.03.05 KAMAKURA KOKI

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AI summary

An anti-vibration optical device (1) includes an objective lens group (20) provided on one side of a housing (10), an eyepiece group (30) provided on another side of the housing (10), an image blur corrector (70) housed into the housing (10) to be located between the objective lens group (20) and the eyepiece group (30) and including an erecting prism (40), a gimbal mechanism (50) rotatably supporting the erecting prism (40) and an actuator (80) for rotating the erecting prism (40) via the gimbal mechanism (50), a first angular velocity detection sensor (91) configured to detect a first angular velocity, which is an angular velocity of the housing (10), a second angular velocity detection sensor (92) configured to detect a second angular velocity, which is an angular velocity of the erecting prism (40), and a controller (90) configured to control the actuator (80) on the basis of the first angular velocity and the second angular velocity.