Version: 2018.1
public bool orthographic ;

Description

Is the projection orthographic (true) or perspective (false)?

When orthographic is true, projection is defined by orthographicSize.
When orthographic is false, projection is defined by fieldOfView. See Also: projector component.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { void Start() { Projector proj = GetComponent<Projector>(); proj.orthographic = true; } }