Self-aligning Lamp Assembly for Absorbance Sensors
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Solution Overview
Problem
Instruments for measuring optical absorbance face alignment issues due to light source replacement, leading to costly and disruptive maintenance, especially in compact devices where field replacement is not feasible.
Innovation Solution
A self-aligning light source and detector assembly with a sensor support and lamp assembly that maintain fixed positions through mating surfaces and set screws, ensuring consistent alignment even after lamp replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the light source is periodically replaced, then the light source can continue to function, but the alignment between light source and detector deteriorates
Solution Approach 1:
The optical assembly is segmented into a detector assembly and a lamp assembly that can be independently replaced. The detector assembly remains fixed while only the lamp assembly needs replacement, eliminating alignment issues between the two components.
Solution Approach 2:
The lamp assembly is pre-configured with alignment features (mating surfaces, set screws) that automatically restore proper alignment when reinstalled, eliminating the need for manual realignment procedures.
2Manufacturing precision
If the instrument is sent for repair when light source alignment fails, then proper alignment can be restored, but productivity and time are lost
Solution Approach 1:
The lamp assembly is designed to be self-aligning through mating surfaces and set screws, allowing field replacement and realignment by the user without requiring specialized repair services or equipment.
3Manufacturing precision
If the instrument is replaced when light source alignment fails, then proper alignment is guaranteed, but cost increases
Solution Approach 1:
By segmenting the optical assembly into replaceable lamp assembly and fixed detector assembly, the cost of full instrument replacement is avoided. Only the inexpensive lamp assembly needs replacement, while the expensive detector assembly remains in use.
Data Source
AI summary
Self-aligning light source and detector assembly having a sensor support mounted in a predetermined, fixed position, a light source holder mounted in a predetermined, fixed position relative to the sensor support, a sensor mounted in a fixed position on the sensor support, and a lamp assembly removably mounted to the light source holder in a predetermined position defined by mating surfaces which engage each other and seat the lamp assembly in the predetermined position whenever the lamp assembly is installed in the holder.