Jones N B, Riley C, Sheya M S, Hosseinmardi M M
J Med Eng Technol. 1984 Jan-Feb;8(1):9-14. doi: 10.3109/03091908409032066.
A need for a colorimeter with low capital and maintenance costs has been suggested for countries with foreign exchange problems and no local medical instrumentation industry. This paper puts forward a design for such a device based on a domestic light-bulb, photographic filters and photovoltaic cells. The principle of the design is the use of a balancing technique involving twin light paths for test solution and reference solution and an electronic bridge circuit. It is shown that proper selection of the components will allow the cost objectives to be met and also provide acceptable linearity, precision, accuracy and repeatability.
对于存在外汇问题且没有本地医疗仪器产业的国家，有人提出需要一种资本和维护成本较低的比色计。本文基于国产灯泡、摄影滤光片和光伏电池提出了一种此类设备的设计方案。该设计原理是采用一种平衡技术，该技术涉及用于测试溶液和参比溶液的双光路以及一个电子桥路。结果表明，对组件的合理选择将能够实现成本目标，同时还能提供可接受的线性度、精密度、准确度和可重复性。
