Robinson R44
Flight Crew Instrument; Flight Crew Flight Instructor
Flight Crew Last 90 Days 180; Flight Crew Total 1345; Flight Crew Type 503
Situational Awareness
Conflict NMAC; Inflight Event / Encounter Other / Unknown
General None Reported / Taken
Human Factors
Typical night tour on last leg. Exiting Class E airspace for Class B airspace.  Made last call in Class E about 1-1/2 miles from Bravo at Rosemead Cemetery on basin helicopter frequency 123.02 as such: ' [aircraft X] southbound past Rosemead Cemetery at one-thousand one-hundred.' No response. Waited 5 seconds. Changed to LAX Class B 119.8. About one mile outside of airspace contacted LAX on dedicated helicopter frequency 119.8 as such: 'LAX [aircraft X] ... approaching Coliseum with copter in sight; request Harbor South transition.' '[aircraft X] [possibly ident] and report altitude and squawk 0207[?].' '[aircraft X] 900 feet; squawking 0207[?].' [LAX then Cleared me through Bravo.]  Me: '[aircraft X]; cleared through Bravo; Harbor South; at or below 900 feet.'  Approx 45 seconds later [aircraft Y] contacted LAX on helicopter radio and ask for my call sign.  LAX Copters gave '[aircraft X]'. No further requests were made by [aircraft Y].  No one called me in the air or on the ground regarding the inquiry. Departing Class B; LAX Helicopters handed me off in the normal fashion.At the position of contacting helicopter; I was still in Class E airspace. While calling helicopter; I saw the other helicopter below and a quarter mile away; approximately 300 feet down; and a quarter mile away; and saw him has no threat.  I made my call to LA and called him out.  I was cruising at 900 feet MSL. He was circling at approximately 600 feet MSL or lower.  The terrain is approximately 100 feet MSL. As I made my call to LA and they called me back; the copter continued to circle toward me. He shown his 'night-sun' light on me but it didn't acquire sufficient angle to illuminate me. This is good; because he would have blinded me with that light.  In order to maintain normal flight safety; I maintained altitude at 900 feet and did not descend until entering Class B airspace safely beyond the circling aircraft. There was no need to alter course; altitude; or airspeed.At no time; short of the 'night-sun' light; were we of any endangerment to one another. No evasive maneuvers were required on our parts. I maintained altitude; direction; and airspeed. We were on different frequencies because we were in a transition area.My only concern in regard to the urgency of the matter was the other helicopter's desire to obtain my call sign without specific cause; thus this report to clarify safety. However; the fact that I could have been blinded by the copter's 'night-sun' light is another matter.
R44 pilot reported NMAC with a police department helicopter in the LAX area.