TRENTON – On TV, Albert Insinnia played a cop who went after sexual deviants. And in real life, he’s a child porn perv, authorities alleged yesterday.

Insinnia, 57, of Bloomfield, turned himself into the Passaic County Sheriff’s Department in Wayne Monday and was released on bail yesterday, officials said.

The man who played a New York police lieutenant on NBC’s “Law & Order: Special Victims Unit” was charged with possession of child pornography.

Authorities allegedly discovered 180 images of child porn on the hard drive of the actor’s laptop computer.

Insinnia declined to comment.

His lawyer said he’s innocent.

“I understand what he’s been charged with, but I do have to say that based on my conversations with him and the authorities involved, I sincerely believe he’s not guilty,” said attorney Joseph Portelli.

According to Portelli, the hard drive on Insinnia’s computer has been transferred various times in the last few years and a variety of people have had access to it.

“Any images that may have been on that computer are not his,” Portelli said, adding that there are no allegations that his client purchased or sold any of the images.

The investigation began after Insinnia, who now sells real estate, took his computer to a Best Buy electronics store in West Paterson for repairs. A technician found the images, police said, and alerted a police detective working security at the store.