求翻译：然上述3项标准并不是选择光传感器时需要考虑的唯一因素，但它们极大地缩小了选择范围，这样可以对相似的器件类型使用最后的标准(比如成本和封装)进行选择。是什么意思？

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So the above three criteria and optical sensors need to be taken into account when choosing is not the only factor, but they greatly narrowed the scope of choices, so that you can use for similar types of devices (such as final standards cost and packaging choices can be made.

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So 3 of these standards is not the only factor to consider when choosing a light sensor, but they greatly reduce the range of choices, can use final standard on similar type of device (such as cost and package) to select it.

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