If possible, please provide only your telephone number to meet the needs of your local post office. If you are absent and cannot pick up items at your location in time, the post office may ask you to remind (in most cases, the postman will only give notice).
PS: We maintain a high degree of security and confidentiality of our customer's personnel information.
We mainly use EMS Express and Parcel Register Post for transportation. You can track EMS Express and your local post office. You can follow the post office at your local post office. Both require your signature to accept.
If you need a track number, please send us an email or leave us a message
We can also use other express transportation such as: UPS, DHL, FedEx, TNT etc. The cost will be higher. If you need the above services, you should contact us first.
Freight insurance is included in the S&H fee.
In general, EMS Express takes about 3 to 6 days depending on the location in the United States. Parcel post mail faster than EMS Express
If you do not use it at ordinary times, please contact us. We will first check its track number. If it does not work, we will send a paper tracking application to the USPS post office, which will take a few days to get a reply.
Our products are welcomed by Japanese. American and European cumtomers. We are highly capable on design creating, and control both parts producing and finished products assembling. We have our own designing team, to create excellent optical system and attractive appearance.
Every year we create new models and unique appearances for customers.
In order to ensure the quality of each part of products, we ourselves control both inner and outer parts (including tooling, rubber, plastic and metallic body and cover) strictly following international quality control procedures. We supply services of not only OEM and ODM, but also OBM.
How to ensure the precision of laser rangefinder?
Today, laser range finders of a wide range of functions, but from the operation mode (or operation principle) can be seen only two, namely: pulse laser ranging and continuous wave laser ranging.The principles and characteristics of the two rangefinders are described below:
The principle of pulsed laser ranging is that a series of very narrow light pulses (pulse width is less than 50ns) are transmitted to the policy by pulsed laser, the light reaches the policy surface and is partially reflected, and the interval between the rangefinder and the policy can be calculated by measuring the moment when the light pulse is transmitted to the receiver. Assuming the measured interval is h, the reciprocating moment of light pulse is t, and the propagation velocity of light in the air is c, then: h=ct/2
Pulsed laser rangefinders emit very strong lasers.The range finding ability is strong, even for non-cooperative policy, the maximum range can reach more than 30000m.Its ranging accuracy is generally 5 meters, the highest up to 0.15m.Pulsed laser rangefinders can be used for ranging from military to non-cooperative ranges, to climate measurements of visibility and cloud heights, and to fine interval measurements of satellites.
Successive wave laser rangefinder usually adopt ranging based on the phase method and its principle is to approach first launched a beam of laser beam through modulation of successive waves, after arriving at the policy on the surface of the beam is reflected, after the launch of the modulation measurement of the phase difference between the laser beam with the receiver to receive the echo can be concluded that policy and the gap between the rangefinder.