TRANSMITTING APPARATUS, DETECTION APPARATUS, AND TERMINAL
A transmitting apparatus, a detection apparatus, and a terminal are provided, and are used in the field of optical devices and detection technologies. An example transmitting apparatus includes a first transmitter and a second transmitter. The first transmitter is configured to transmit a first light beam. The second transmitter is configured to transmit a second light beam. A longest detection distance of the first light beam is shorter than a longest detection distance of the second light beam. The second light beam has a long longest detection distance, and is applicable to long-distance detection. The first light beam has a short longest detection distance, and may be used for short-distance detection. The second transmitter transmits the second light beam, so that a blind area formed during long-distance detection can be detected. The first transmitter and the second transmitter work in a time division manner.
1 . A transmitting apparatus, wherein the transmitting apparatus comprises a first transmitter and a second transmitter, wherein:
the first transmitter and the second transmitter are configured to transmit light beams in a time division manner, the first transmitter is configured to transmit a first light beam, and the second transmitter is configured to transmit a second light beam; and
a longest detection distance of the first light beam is shorter than a longest detection distance of the second light beam.
2 . The transmitting apparatus according to claim 1 , wherein at least one of the following condition is true: an energy density of the first light beam is less than an energy density of the second light beam, or
a power of the first light beam is less than a power of the second light beam.
3 . The transmitting apparatus according to claim 1 , wherein the transmitting apparatus further comprises a beam homogenization component; and
the beam homogenization component is configured to perform homogenization on the first light beam to obtain a first detection signal.
4 . The transmitting apparatus according to claim 3 , wherein
the beam homogenization component is further configured to perform homogenization on the second light beam to obtain a second detection signal.
5 . The transmitting apparatus according to claim 4 , wherein a field of view of the first detection signal and a field of view of the second detection signal overlap or have no gap.
6 . The transmitting apparatus according to claim 1 , wherein the first transmitter and the second transmitter each comprise at least one laser.
7 . The transmitting apparatus according to claim 6 , wherein the at least one laser comprises at least one of a vertical-cavity surface-emitting laser (VCSEL) or a photonic crystal surface-emitting laser (PCSEL).
8 . The transmitting apparatus according to claim 6 , wherein the first transmitter comprises a first laser and a second laser; and
the first laser and the second laser are respectively disposed on two sides of the second transmitter.
9 . The transmitting apparatus according to claim 6 , wherein the second transmitter comprises a first laser group and a second laser group, the first laser group comprises one or more lasers, and the second laser group comprises one or more lasers; and
the first transmitter is disposed between the first laser group and the second laser group.
10 . The transmitting apparatus according to claim 6 , wherein the first transmitter comprises a third laser and N fourth lasers, and the second transmitter comprises N fifth lasers, wherein N is an integer, and N≥2;
in a first direction, the third laser is disposed between a third laser group and a fourth laser group;
the third laser group comprises M laser pairs, the M laser pairs are arranged in the first direction, each laser pair in the M laser pairs comprises one fourth laser and one fifth laser that are disposed in a second direction, and a first gap exists between the fourth laser and the fifth laser in each laser pair, wherein M is an integer, and N>M≥2;
the fourth laser group comprises N−M laser pairs, the N−M laser pairs are arranged in the first direction, each laser pair in the N−M laser pairs comprises one fourth laser and one fifth laser that are disposed in the second direction, and a second gap exists between the fourth laser and the fifth laser in each laser pair; and
in the second direction, a location occupied by the third laser comprises a location of the first gap and a location of the second gap, and the first direction is perpendicular to the second direction.
11 . The transmitting apparatus according to claim 1 , wherein the first transmitter is configured to transmit the first light beam in a first time period, the second transmitter is configured to transmit the second light beam in a second time period, and the first time period and the second time period do not overlap.
12 . The transmitting apparatus according to claim 11 , wherein the second transmitter is further configured to transmit a third light beam in the second time period, and a longest detection distance of the third light beam is shorter than the longest detection distance of the second light beam.
13 . The transmitting apparatus according to claim 1 , wherein the transmitting apparatus further comprises a collimating lens group; and
the collimating lens group is configured to collimate light beams transmitted by the first transmitter and the second transmitter.
14 . The transmitting apparatus according to claim 13 , wherein a distance between a focal plane of the collimating lens group and the collimating lens group is a first distance;
a distance between a first plane of the transmitting apparatus and the collimating lens group is a second distance, and the first plane is a plane on which a transmit end face of the first transmitter and a transmit end face of the second transmitter are located; and
the second distance is different from the first distance.
15 . A transmitting apparatus, wherein the transmitting apparatus comprises a first transmitter, a second transmitter, and a beam homogenization component, wherein:
the first transmitter is configured to transmit a first light beam;
the second transmitter is configured to transmit a second light beam, wherein a longest detection distance of the first light beam is shorter than a longest detection distance of the second light beam; and
the beam homogenization component is configured to perform homogenization on the first light beam to obtain a first detection signal.
16 . The transmitting apparatus according to claim 15 , wherein the beam homogenization component is further configured to perform homogenization on the second light beam to obtain a second detection signal.
17 . The transmitting apparatus according to claim 16 , wherein a field of view of the first detection signal and a field of view of the second detection signal overlap or have no gap.
18 . The transmitting apparatus according to claim 17 , wherein the first transmitter and the second transmitter are configured to transmit light beams in a time division manner.
19 . A detection apparatus, wherein the detection apparatus comprises a transmitting apparatus and a photodetector, and the transmitting apparatus comprises a first transmitter and a second transmitter, wherein:
the first transmitter and the second transmitter are configured to transmit light beams in a time division manner, the first transmitter is configured to transmit a first light beam, and the second transmitter is configured to transmit a second light beam; and
a longest detection distance of the first light beam is shorter than a longest detection distance of the second light beam;
a first transmitter in the transmitting apparatus is configured to transmit a first light beam, and a second transmitter in the transmitting apparatus is configured to transmit a second light beam; and
the photodetector is configured to receive an echo signal corresponding to the first light beam and an echo signal corresponding to the second light beam.
20 . The detection apparatus according to claim 19 , wherein the detection apparatus is configured to generate a first control signal and a second control signal, and the first control signal is different from the second control signal;
the first control signal is used to control the first transmitter to transmit a light beam; and
the second control signal is used to control the second transmitter to transmit a light beam.