折叠编辑本段概述
望远镜测距仪，是激光测距仪的一个分支，或者叫做远距离激光测距仪。一般它的测距距离是500-3000米。望远镜测距仪，由于采用脉冲法测距，所以其测量盲区在15米左右。测量误差在+/-1米。
An overview of the
Telescopic rangefinders are a branch of laser rangefinders, or long-range laser rangefinders. Generally, it has a range of 500-3000 meters. Telescope rangefinder, because of the pulse method of ranging, so its measurement blind area in about 15 meters. The measurement error is +/-1 m.
折叠编辑本段原理
望远镜测距仪一般采用脉冲法来测量距离。脉冲法测距的过程是这样的:测距仪发射出的激光经被测量物体的反射后又被测距仪接收，测距仪同时记录激光往返的时间。光速和往返时间的乘积的一半，就是测距仪和被测量物体之间的距离。脉冲法测量距离的精度是一般是在+/-1米左右。另外，此类测距仪的测量盲区一般是15米左右。
The principle of
Telescope rangefinder usually uses pulse method to measure distance. Pulse ranging works like this: the laser emitted by the rangefinder is reflected off the measured object and received by the rangefinder, which simultaneously records the time of the laser's return trip. Half the speed of light times the round trip time is the distance between the rangefinder and the object being measured. The accuracy of the pulse method is generally around +/-1 m. In addition, this type of rangefinder usually has a blind area of about 15 meters.
折叠编辑本段品牌
市面上销售的望远镜测距仪品牌大约有10个，以国外品牌居多。全球前4大品牌是:
1.美国图雅得Tureyard
2.日本尼康NIKON
3.美国博士能BUSHNELL
4.美国纽康NEWCON
据2009年统计数据，上述4个品牌占据了北美市场90%以上的市场份额。其中图雅得43%，尼康23%，博士能22%，纽康5%。
brand
There are about 10 brands of telescope rangefinder on the market, most of which are foreign brands. The top four global brands are:
1. Tuyadh Tureyard, USA
2. NIKON From Japan
3. American Ph.D. BUSHNELL
4. NEWCON, USA
According to 2009 statistics, the above four brands accounted for more than 90% of the Market share in North America. Of these, 43% were Tuad, 23% Nikon, 22% Ph. D., and 5% Were Newcome.
折叠编辑本段选购要点
1.望远镜测距仪基本参数是测量距离。首先应该选择您需要的测量距离的望远镜测距仪。
2.测量精度，所有厂家标称的测量精度都是+/-1米，这只是理论数据。测量精度取决于测量目标环境，望远镜测距仪镜头，红外激光发射器质量以及数据处理器的精度。
前市面上采用镜头比较好的品牌是图雅得和尼康。这也是他们能够成为北美销售冠亚军的原因之一。
总之，建议购买的时候选择知名品牌购买。因为小品牌的测量距离和精度都会有很大的水分。
The point of choose and buy
1. The basic parameter of telescope rangefinder is measuring distance. You should first select the telescope rangefinder you need to measure the distance.
2. Measurement accuracy. The nominal measurement accuracy of all manufacturers is +/-1 m, which is only the theoretical data. The accuracy of the measurement depends on the target environment, the lens of the telescope rangefinder, the quality of the infrared laser emitter and the accuracy of the data processor.
The best lens brands in the market are Tuyard and Nikon. That's one of the reasons they're number one and number two in North America.
In conclusion, it is recommended to choose well-known brands when buying. Because the measurement distance and precision of small brands will have a lot of moisture.